Actually, I can see her in the role of Ironheart.
She is undoubtedly a tech genius, and (recently?) the comics have cast a young African-American girl (Riri?) to take over the Ironman mantle. I doubt Suri will be taking over the Panther title anytime soon, because it's only recently been introduced to us, whereas we've had Ironman since the beginning.
RDJ is an expensive cast member, and his contract concludes (though can be extended) with Infinity War. It wouldn't surprise me if somehow Shuri meets Stark who, impressed with her achievements, works with her making her his replacement; Stark can then (assuming the character survived IF) become director of SHIELD or something like he does in some of the comics, with Shuri taking over as Ironheart.