Re: A New world

Developers do have other worlds in stores:
http://plantsvszombies.wikia.com/wiki/Kongfu_World
http://plantsvszombies.wikia.com/wiki/Sky_City
And potentially "Steam Ages" in July.

But for some unknown reasons, they are only available for the Chinese version of the game which for some other unknown reasons has some differences with the international version.

And actually it seems that developers are working more on new concepts for the Chinese version than for the international version:

http://plantsvszombies.wikia.com/wiki/Plants_vs._Zombies_2_(Chinese_version)/Upcoming_content
http://plantsvszombies.wikia.com/wiki/Plants_vs._Zombies_2_(Chinese_version)/Concepts 

So on the one hand, EA do have some new world that they could easily adapt from the Chinese version tor the international version. On the other hand, I think that Kongfu and Sky City world had been released ~3 years ago, so it seems unlikeky that EA will release them for the international version of the game or develop new worlds. :/ 

@MAGICDAVESHROOM So basically a snow pea ?  😛