I'd say Sylar was always a bit psychotic ("MY NAME IS SYLAR!") but now just more so.

I thought the show suggested that Molly could find anyone, powers or not. Also, I don't see Isaac coming back. As far as Ando, I don't want to see him die but I've seen the guy in a McDs commercial and I wonder if that means he needs work after being killed off.

Remember, Sylar kills Candice (illusion chick) to use her ability to become President. Since she's not the most important character, I'd say that part probably will happen.

Perhaps Nathan flies Peter to explode somewhere safely, sacrificing himself. With Nathan dead, Sylar would then be able to take impersonate Nathan as a congressman.