Yeah after 'A' I assumed Gareth would be the main villain of s5 (at least the first half) and that the Hunters were going to be stalking them after their inevitable escape.

But him not being the main villain is :|

I guess they have more planned for s5a. I mean in season 4a we had the flu, then the Governor. Maybe 5a will have Gareth, then the main villain. A LOT can happen in 8 episodes after all.