Board Thread:Plants vs. Zombies 2: It's About Time/@comment-5366868-20130731045928/@comment-12391511-20130802103845

Wintermelon43 wrote: there's only 4 worlds

According to one of the early PvZ2 videos, one of the Popcap employees said that they are done with 3 and are currently working on 2 more worlds. 1 likely being the future and the other is still unknown.

Assuming the actual time period will affect much of the lawn (Egypt has tombstones, Pirate Seas has ocean water, Wild West has moving carts) as well as zombies, the stone age might be a place to go. Maybe some interactions would include lava terrain or even dinosaur zombies.