Since the mysterious tease post by Mr Scorpion let's all speculate and guess and spread some false rumours about what we're getting 
I heard all the mobs are getting orc AI and have 99% fire resist and the subs can hit you when you're not even on the same floor!
I heard all the mobs are getting orc AI and have 99% fire resist and the subs can hit you when you're not even on the same floor!