According to a recent screenshot of 2 of the new achievements for Plants vs Zombies, a new versus and co-op DLC will be available.
The new co-op mode is called ZFF’s 4 Evr, while the new versus mode is called Versus vs Versus.
Speaking of Plants vs Zombies, we wrote an article about a new tease made by PopCap games regarding Plants vs Zombies, the announcement will probably be made on August 2.