PvE areas

I'm not done with Town Center yet and I'm not in a huge hurry to do so but I saw on the founder updates that plants will also be getting Mount Steep and zombies will get Weirding Woods and Town Center. 

Are there are plans for zombies to get mount steep and plants to get weirding woods? Will we be getting more PvE zones in the future? GW has mostly focused on PvP but part of why I liked GW2 more than 1 was the storyline quests and the backyard so hope we see more of these free roam zones; Town Center is really fun and having more would be great.