fl0w and Warhawk, according to Game Informer magazine. Firing Squad reports that a recent issue of the magazine reveals expansions in development for both downloadable titles, with planned releases in December.
The Warhawk expansion will introduce a dropship into the game, which can pick up and relocate ground vehicles. The fl0w expansion, meanwhile, will add a multiplayer mode to the abstract game, as well as a new playable creature. While expansions for Warhawk are a no-brainer, it remains to be seen how typical downloadable content will fit in with the incredibly atypical fl0w.