Another idea that I had come to me while chatting on the IRC channel (details on that here). I don' t know if minigame is the best name for this, but I couldn't think of any more fitting.
I'm certain that some of the PvP/arena maps - for a start - will be suitable for use for hosting PvE matches of various types. A 'picture' is worth a thousand words, so allow me to illustrate:
Two teams are dropped into the arena, where they only have access to powers specific to that venue. For this particular example, each team has four players with a power to shoot or throw the ball and one player with a 'shield' to protect the goal.
I imagine anything from races (vehicles, superpowers, pogo sticks, etc.) to unique takes on team sports (such as the basic example above) to 'boxing'* matches. Any particular variant that's popular enough (or it could be put to a vote each 'season') could even be given its own teams, leagues, divisions, etc. There'd be no particular point to these other than to have fun and waste a little time ("You think you're so tough? Well, then we'll settle this like real superheroes and decide it over a game of squeegeeball!").
I should think that the only rule for these is that the more unique and crazier, the better.
* Another example: Imagine something like the Thunderdome, albeit with moving targets rather than a hemispherical cage. The goal is to box/knock the opponent into such a target. One of this arena's powers could be a 'super punch' - almost certainly with a cooldown timer - that knocks the target back (and/or possibly up) a larger distance.
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