I see no reason not to let us battle minions down the line, implement even more minions and have people compete against each other and against NPCs in minion battles.
If done right it could be amazing, really hoping we'll see something like this down the line, hopefully sooner rather than later.

We could fight anywhere, anytime with other players and live tournaments and such could be held every week and month, these tournaments could be streamed on big screens in the game for the whole server to watch, it'd be awesome.