For the fans, anything is possible. They can start to let their imagination run wild.
Both teams are in Group A with China, Venezuela and two of the three FIBA Olympic Qualifying Tournament (OQT) winners. Two-time defending champions USA will be prohibitive favorites in their pool and the tournament. But danger always lurks at every turn in international basketball.
In Group B is a tantalizing mix of heavyweights. Argentina, Brazil, Lithuania, Nigeria, Spain and the other OQT winner will trade blows, looking for a top-four finish and if possible a top-three in order to avoid a likely clash with the USA in the first knockout game. The Americans are not certain Group A winners, yet no one will be betting against them.
There are 31 finalists for the 12-man USA squad. Head coach Mike Krzyzewski and USA Basketball supremo Jerry Colangelo have the unenviable task of naming their final squad. One certainty would appear to be Stephen Curry, a two-time world champion with the USA and reigning NBA MVP. Will Olympic gold medal-winning veterans in 2008 and 2012 that missed the 2014 FIBA Basketball World Cup, players like LeBron James and Chris Paul, return for Rio?
Remembering how the team played at Spain 2014, one could imagine that the 10 players from that side that have been made finalists will be in the Olympic squad.
Can anyone beat the USA? Talent-rich Australia may give them a tough game in Group A. Should France win the FIBA Olympic Qualifying Tournament (OQT) in Manila and Serbia prevail in the Belgrade one, both sides would enjoy the challenge of facing the Americans if they landed in the group.
The crossover could be tricky for the USA, too. Imagine the atmosphere in the Carioca Arena 1 should the hosts face the USA in the Quarter-Finals. Brazil almost beat the USA in the Preliminary Round at the 2010 FIBA Basketball World Cup. Spain, Argentina or Lithuania would pose a threat to the USA in the last eight.
How can it be that a Boomers program with such a long history in international basketball has yet to reach the podium of a major event? That may change this year. Head coach Andrej Lemanis will have a terrific, experienced backcourt with Pat Mills and Matthew Dellavedova, a powerful frontline with Andrew Bogut and Aron Baynes and solid wings in Joe Ingles and Ryan Broekhoff.
Australia will have a deep, talented roster at the Rio Games. Remember how good they were at last year's FIBA Oceania Championship when Ingles and Baynes did not play?
It seems Lemanis's squad will be good enough to finish second in Group A and should at least finish end up in the top four for the third consecutive Olympics. But it's not out of the question they could finish fifth, depending on their result against Venezuela. One thing is for sure. If they were to advance, the Boomers would run through a brick wall in a bid to reach the last four.
A young, tenacious, physical China under veteran coach Gong Luming won the 2015 FIBA Asia Championship title. They will need to have the same spirit and be fully healthy to have any success in Rio. China were terrific with their home crowd behind them last year. The best player of all was their three-time Olympian, Yi Jianlian.
That event is no comparison to the level of competition they will face this time. Every game will be like a do-or-die clash for the Chinese. The clash with Venezuela is one that the Far East side will already be identifying as a must-win game for them to have a shot at reaching the Quarter-Finals.
Anyone that has seen Venezuela head coach Nestor 'Che' Garcia in action will know that he can match wits with anyone and do a good job of making adjustments during games. Add his nous to an emotionally-charged up squad that is hellbent on proving last year's FIBA Americas Championship win was no fluke and the Vinotinto should be dangerous. They will try to recreate the magic of their Semi-Final triumph over Canada which punched their ticket to Rio.
The USA are likely to be too tall of an order for Venezuela but none of the other sides, including any of the OQT winners, will be striking fear into Garcia's men.
Every year, the expectation outside Argentina is that the age factor will at last catch up with the national team, yet it never does. Luis Scola, now 35, remains an elite international basketball player. Since helping Argentina reach the Final of the 2002 FIBA Basketball World Cup, Scola has been a warrior. Last year, he led Argentina to a come-from-behind win over hosts Mexico in their FIBA Americas Championship Semi-Final to qualify for the Olympics. Scola was the tournament MVP.
With another veteran, 36-year-old Andres Nocioni, and point guard Facundo Campazzo in the fold, and with an intelligent coach in Sergio Hernandez that has plenty of savvy, El Alma have a great shot of at least reaching the Quarter-Finals.
A hip operation may end up costing Brazil their experienced center Tiago Splitter, but head coach Ruben Magnano can call on many of the players who did so well at the 2014 FIBA Basketball World Cup.
Brazil will have two NBA point guards in Raul Neto and Marcelinho Huertas, front court quality with Nene and Anderson Varejao. There will also be the Brazilian Blur, Leandro Barbosa. Mangano led Argentina to Olympic glory in 2004 and will be hopeful of getting the team to the podium in 2016.
There is not a prouder, more combative basketball nation in Europe than Lithuania. Head coach Jonas Kazlauskas will present his players with a game-plan that gives them a chance to win every time they run onto the court. If Mindaugas Kuzminskas continues his rise to stardom, look out! In 2015, Lithuania were terrific.
Lithuania, who will no doubt take plenty of fans to Brazil, will be looking to return to the Olympic podium for the first time since 2000.
The presence of Pau Gasol, Sergio Rodriguez and Sergio Llull will be reassuring for Spain boss Sergio Scariolo. Coming off his finest hour as a coach, when he led Spain to EuroBasket 2015 glory, Scariolo is confident that his team can go up against any opponent and win.
One big question mark is the health of Rudy Fernandez. If he gets back to 100 percent after missing a lot of games this season due to injury, it will be a huge positive. Scariolo is certain to bring back big-name players that missed last summer's triumph but he must not sacrifice the team chemistry that was so good last year. If Marc Gasol recovers from his foot fracture and plays, Spain may represent the biggest threat to USA supremacy.
African teams have struggled to make their mark at the Olympics but Nigeria will be looking to change that when they compete in Brazil. The conclusion to be drawn from their AfroBasket 2015 title-winning campaign is that Nigeria will have a real shot at a top-four finish.
Chamberlain Oguchi will arrive in Rio as one of the top shooters in international basketball. The 2012 Olympian was a combined 11 of 23 from the arc in D'Tigers' two more important games last year, their AfroBasket Semi-Final triumph over Senegal and their Championship game triumph over Angola.