For AN 2012 we did ReBoot! It was amazing. We spent months working on the costumes, mostly because Hack, Slash and Megabyte's head were made from scratch -> paper mache and cardboard. Lots and lots of mache'ing. The other costumes took about a week. We were swarmed and couldn't really get into the con until Sunday when we were out of costume lol.
I loved the people I got to meet there and kudos to all the other ReBoot cosplayers that made it out!!!