Tournament ideas.

Heroes-with-Amnesia Tourney:

A tournament where you get to block one of your opponents powers (they cannot use it for the entirety of the match, this includes passives) with the downside that one of your character's powers get randomly blocked.



Heroes-On-Call Tourney:

You have to pick nine characters of your choice from your roster. Then the game will randomly pick three of the characters for you to use in your first match. With the next match picking from the remaining six and the following the last three characters. Then repeat, with new random teams for each set of three matches. You use all nine characters over the course of three match cycles. I think this would encourage diverse leveling as well a diverse teams you see on defense.

It doesn't have to be nine characters. They can do it with six.