Level 100 is enough. I want the endgame to revolve around building better teams and playing smarter, not just getting more levels because the enemies have more levels. I was excited to finally hit level 100 but if it ends up just being a fake out and there's still another 10, 20, 30, or 100 levels to grind through in order to catch up to every NPC I have to deal with, that would be a huge disappointment.