It really could go any way. It depends on: how much the actors love the show/role/cast, how much the production team loves the actor, what other things the horizon the actors might have opportunities for (or not).
It's really impossible to tell. IF it was definitely closing in Jan, it MIGHT have influence on the actors' choices.
Out of the 4 leads, I would imagine at least one of them leaving.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.