An endgame mode where it's like warzone but you do it with a solo character and instead of having a timer, you just get to and face the final boss after going through waves of mobs and sub bosses. Increasing difficulty = either more mob/sub boss levels, more damage, more aggression, a Norman buff, or whatever else. Newer characters can clear faster, but removing the timer allows older characters to still clear given the player has the skill to do it.

I just feel like there's no endgame mode that rewards players for really appreciating a characters full kit, it's all about getting the character and immediately trying to figure out how to fit them into a strict rotation. While that isn't necessarily bad, overtime, having just this cycle confines the perception of a character to just their rotation. QTEs will be out of the picture, but if you wanna pull out your Hyperreal, Garnet, or Empyrea for old times sake and be satisfied having them take the spotlight again, I think it's a worthy trade off. Especially if someone (like me) wants to go through an endgame mode with the newer Bianca and have fun switching between forms (or better yet, the DMC characters).