Childish, a little. But fun, probably. I’ll be honest, I’ve never played any of the Plants vs. Zombies franchise, but its feature and demo at the E3 EA presscon is pretty attractive, hearkening to MMO and Tower Defense gameplay (maybe a little bit of Fat Princess too, PS3 players?).
The shooter (kind of comically) is slated for 2014 on all platforms (PC, PS3, maybe PS4, Xbox One, and Xbox 360).