About Shadow, if Sega could stop forcing writter make him a wannabe Vegeta in all media he apparear now and gave his characters some more room to breath & express himself, I think he could still fit just fine. SA2 & 06 show he isn't against having friends or peoples to help him & even respect Sonic alot, and not in a overly "tsundere" way, where he avoid to saying it to his face. Shadow isn't solely defined by his pride in earlier titles - outside of his own game ironically enough, tho even then, in the true ending, he decide to let it go and become a better person - but due to all the "EDGe" memes & Sega beng too scared of doing anything interesting with their characters ( probably due to Sonic 06 failure & the Ken Pender controversy), Shadow, among others, are just...there.