I think it would be fun to have some events that use old mechanics/rules/powers that have since been replaced. Especially Environment Tiles. I miss those. An event every now and then using them would be fun. Also, maybe events with old, pre-nerf power sets. I miss using Spider-Man.
What are environment tiles?
That’s what the team-up tiles used to be. The different battles take place in different environments (city streets, computer room, snowy area, desert, etc.) and you could fire off environment powers (which were replaced by team-ups). I’m afraid I don’t remember what those powers were.