welcome to all new members,enjoy the stay.
well,about event you can try to do "best madman",or a ingame tourney in different or interesting mod config,such as aikidobigdojo without disqualification,i have tried before and i must say that is fun and requieres some skill to win(throw out of dojo).
and i liked DerpOne's Lara Croft cosplay,guess you can try to do sindel or sonya blade cosplay,from mortal kombat series.