Thanks to a modder, we might just see the strongest version of Sean.
Ultimate Marvel vs Capcom 3 easily has some of the longest legs in the FGC, with fans only ramping up their support for the game as the time goes on.
The modding scene in particular revitalized in recent times, in parts thanks to breakthroughs in roster mods that allow for addition of alternative or entirely new characters.
One of the latest and most promising additions from the modding scene is Sean from Street Fighter III, currently a WIP mod from CaliKingz01.
Sean has been easily one of the most underappreciated characters in the series. Despite often being dismissed as yet another shoto, he's an entirely distinct character. Between having "odd" versions of the usual shoto moves, his tackle and volleyball projectile added so much personality to his moveset that you're just not going to find an alternative in any roster.
Hopefully he still has a shot at making it into Street Fighter 6, but it's cool to see the tag fighter version of the character going all out.