PopCap announced a few new Plants vs Zombies revelations today, including a release window for the full sequel and the closed beta launch of a Facebook version. Plants vs Zombies 2 will launch in early summer, according to the company. In the meantime, you could check out Plants vs Zombies Adventures, a new social PvZ game.

PvZ Adventures is only in closed beta for now, with plans to expand to more users this spring. It focuses on "road trips" as you travel the country to stop zombies in a variety of settings. You'll be able to send hordes to invade your friends, and the game will boast new zombie and plant types, new defense methods, and leaderboards. You can check out the Facebook page for a chance at getting into the beta, which for now is limited and region-based.

A look at Adventures from Indie Social Games seems to indicate it's a tower defense title, as zombies take a variety of paths to reach a motor home and you're given a limited number of plants to place at the start of each round. New plants include the melee-focused Beat and the Aspearagus, while new zombies include a barrel-wearing charger and an armored Mad Hatter.

"Plants vs. Zombies Adventures is a highly accessible, zombie-zapping adaptation of the original game designed specifically for Facebook," said PopCap San Francisco head Curt Bererton. "The game not only offers up exclusive new plants and zombies along with old favorites, it features all-new forms of zombie combat that will open PvZ to a whole new world. We like to think we’re creating a brand new twist on the classic Plants vs. Zombies that is the most social, shareable and expansive Plants vs. Zombies experience ever."