Bam Adebayo-M'Baku
Philadelphia 76ers superstar Joel Embiid is one of the more physical players in the NBA and his strength and physicality gives Team USA an edge in the post. While Embiid did foul out in one of their exhibition games in just 12 minutes, if he can't be stopped in the NBA from getting buckets, then the international competition probably won't stand much of a chance either.
As for his MCU counterpart, M'Baku of the Black Panther franchise seems like a good character, given that he is one of the strongest humans in the entire universe. Like Embiid, M'Baku isn't lacking in charisma and personality but also has a leadership quality, making them very similar.
Devin Booker-Human Torch
As the Fantastic Four begins to be introduced into the Marvel Cinematic Universe, Phoenix Suns guard Devin Booker seems like a good Human Torch, aka Johnny Storm. Human Torch is known for his confidence and eager nature, with his famous "flame on!" catchphrase.
Compare that to Booker, who is one of the league's most volatile scorers, racking up eight 50-point games, tied for the sixth most among active players. In fact, LeBron, Durant, Curry, and Joel Embiid are among the only players with more. Booker is a great player in his own right and a prolific scorer but his ability to catch fire and "flame on!" is a big reason he is on the team.