On one hand, I agree because it's so cliche to have every villain come back over and over in a saturday morning cartoon fashion. On the other hand, I love Bison and Urien's design and how they play so I would very much enjoy them being included in every game as long as it's a flashback version or something and they're not actually in the current story arc because they live forever or have revived for the 3rd time or some stupid shit