Doesn't it totally make you feel like it's going along the same path as the Legacy for Kain series? Not necessarily in bad cliff hanger endings, but in terms of where the story is leading to and all the time jumping elements?
Don't forget the PSP prequel is coming out in a couple weeks too. If the demo was any indication, the game should be pretty close to the standards of a full on console title.
Basically the only thing I garner from the ending is that Zeus is going to get his shit ruined. As far as the time travel thing, I'm rather confused as to how Kratos could rewind his thread to before he was born. That makes no sense to me whatsoever, but whatever
I was one of the lucky ones to get a psp demo. It's definitely comparable to a console game (and probably will be ported at some point).