The Frostbite 2 engine gained a strong reputation for realism after it was used in Battlefield 3, and started branching into other genres, such as EA's racing titles. But we might see what it does with a completely different art style too, under the care of PopCap.
A job listing dug up by Superannuation asks for a software engineer with Frostbite 2 experience to work at PopCap. The project is called a "AAA console title" and specifically mentions experience working on PlayStation 3 and Xbox 360.
Signs point to this being related to the unconfirmed Plants vs Zombies shooter that we heard about in August. It makes sense for EA to use its proprietary engine and show off its flexibility to boot, but Frostbite 2 wouldn't have been our first guess for the backbone of a cartoon art style.