Zion's ability to dominate inside is very big especially now that Ingram is very confident already with his shooting and attacking the paint.
If he keeps being healthy, we might see again another player in today's basketball that is dominating the paint. Even though he can shoot 3s, his main offense is coming from the inside. Not just in offense but he is also a good defender under the rim. His presence inside is enough for that specific player not to attempt to attack the rim.
About Brandom Ingram, he's been always acting as the main guy since his Lakers day but sorry to say that he really doesn't have the ability to be the main guy or at least carry a team. He is sometimes on and off too with his performance.
With CJ playing with them I think the three stars need to have good chemistries, they are more competitive now as a
team considering both Jonas and Willy a current MVP from last FIBA Europe will jibe with them.
Zion can play as a power forward while both CJ and Brandom will take care mostly outside,
the two towers can bring them more chances of offensive rebounds, though it will be going to
depend on how the coaches will take care of the players rotations and how they will design the play.