It will probably be something similar to Terraria. I mean Terraria is one of the most popular indie games out there. It would be a big risk for them to step away from their formula. I see it being an RPG-ish style Terraria game if anything. Hopefully with a story mode and sandbox mode. I mean don't get me wrong it could be a Terraria-Cart!
How many times am i going to have to quote this.This is a brand new project and not related to anything we have mentioned in the past.