I think the closest we'll get is a Big Hero 6 world in Kingdom Hearts 3. Since Disney seems to be keeping it split from the MCU, despite it's origins, don't think that would encroach upon the potential a Marvel world would have.
...but yeah, honestly, there's no reason to be worried about SO5 at the moment. It's going to exist, and there's some basic information about the game, that's it. Yes, Star Ocean 4 may not have been your cup of tea, but it's one game in a franchise; very few franchises, companies, etc. bat 1.000, so why should this be any different?