CanonRumors has heard from a "good-source birdie" that both Canon and Sony are interested to purchase Pentax for some (maybe different) reasons! (via 1001 Noisy Cameras)
So, if that really happens, the brand Pentax will probably disappear, just like the fate of Minolta after Sony bought it! :-(
Btw, I had made the Canon-Pentax marriage long time ago, see this.