I think that, while Gork knows I want it more than anything, we are probably going to be waiting on destruction for a while yet. It would be I think, another misstep to bust out something else before Death gets a legit Sigmar release (new tome, models, etc). I think that its likely we will see:
New Magic supplement with the weird sun and others
AOS 2and/or a new starter set (Death vs Wizcast)
MAYBE some kind of scenery or something
But hey, if they want to prove me wrong and rock up with a bunch of amazing new Squigs, more power to em!