This isn't a high priority and when mod support gets here it could probably be done by the community. But, I personally think it would be cool to play as characters from previous Coffee Stain games. For myself, any of the Sanctum characters would be a blast from the past and they already kind of fit with the building nature of the game. Might just have to remove the oversized building gauntlet...unless it was implemented with animations to build instead of the build tool! Heck port the old construction voiced lines over and you even have a character with some voice acting. Plus it's a little more exciting multiplayer wise where everyone is currently a carbon copy.