The Jump Ultimate Stars game is the way you successfully pull of something like this. Why can't the newer titles have a power/progression system, for example abilities tied to manga panels that game had, or worlds that are actually in the titles (instead of the real world). Objectives in fights to unlock stuff instead of the same braindead fighting mission over and over. Why can't they have a bigger selection of titles to choose characters instead of the 6th or 7th dbz or naruto character? Minor characters in assist moves, smash like battles etc. The potential is endless.
A big budget game in this fashion i'm sure would do much better than what jump force is now. I already was disappointed by J stars for similar reasons, but this game does it even worse. This game has a casual western audience in mind (see character choices), and underestimates the popularity of manga and anime also for the lesser known series in the west. This should be a love letter to shounen jump like smash ultimate is to gaming. That's why you should let a creative team with passion for jump make it, not this soulless shit.