Didn't they show a guy in a straitjacket being held on level 5 in some of the previews, I highly doubt that with a dozen (minus three now) mass murderers on the loose the big bad will be anyone but one of them. and if the spoiler at the top of the page is true - huh, how do you fight someone like that and more importantly how do you make anything from then on not look like a step backwards.
but onto more important matters
(Did anyone think that Nathan's killer looked like peter? Perhaps he travels back in time to stop Nathan going public.)
Thankyou
and now onto my rambling thoughts on the episodes so far.
Also I doubt it will end up happening but I can see a way for sylar to die, his one major weakness is the supersonic hearing ability - though they do seem to forget about it a lot - and if you've seen the webisodes, that postman guy has already been shown to be able to blow peoples brains out with his voice. Imagine how much damage he would be able to do to sylar.
They seem to have forgotten that useful thing called Claire's blood - Bob certainly could do with some - on that note I wonder if Peter's blood will have the same effect on people.
The new nikki: (I can't be bothered learning her name) it is quite clear that the writers like the actress who plays her, but didn't want to keep the unpopular character around, but really this has to be the most contrived way of doing it possible. also having her as a public figure "Ice queen" who can freeze people *gag*
I'm glad the German didn't last long (he had a couple of mentions in the webcomic) and he's as clearcut a magneto ripoff as you could get without actually making him wear a tinfoil hat.
I'm curious as to where peter got the ability to put people inside other peoples bodies, that's certainly quite a gift, and could make for an interesting villain at some point.
Angela's dream has a few points of interest
-either nikki/jessica is still alive or what ever her replacement is called goes evil - possibly leading or at least trying to lead Nathan to evil again (we get it guys politics is evil)
-Parkman sr gets out of his nightmare world as well as adam getting dug up. (on that topic i would suggest people check out this comic
http://www.nbc.com/Heroes/novels/index.shtml?novel=66) and given the way that they placed adam and nikki side by side might hint that she is the person referenced in that comic - though again it could be jessica (unlikely as Jessica seemed to exist to protect micca and while she wasn't exactly faithful to DL she only did it because it was what needed to be done to protect nikki and micca) or the ice queen or even a third "nikki" - the doctor said he "Made" her - I would presume on lindermans orders (remember what he said about having controlled nikki's entire life) he could have made innumerable copies of her for what ever reason.
A few criticisms:
The show seems to be becoming somewhat reliant on the thing of traveling to the future to see what the problem that they are facing is, I'm guessing that's what's going to happen in the next episode with the two Peters taking a tour of dystopian future number 3.
I also don't really like the way the show just chucks away characters it no longer finds useful with thin or no explanation - the prime example is the Irish girl from the second series, but molly and nathan's wife both got similar treatments.