There are rumors that somebody "important" dies for real tonight. I think it will be Sandra Bennet. The Puppetmaster will ask her to choose which mother to kill. She'll choose Meredith because clearly her attachment to Sandra is much stronger. So the Puppetmaster will force her to kill Sandra. (This baroque theory is courtesy of someone on TWOP, and I can see it happening.)
That will really screw up Claire and make her more vulnerable to Sylar's manipulations based on everything they have in common: mutant freak outsiders; adopted; related by blood; and now they've both killed their adoptive mothers thru no actual fault of their own...
The upcoming storyline will be Noah trying to pry Claire away from Sylar, who grotesquely will become her "new family" since she won't be able to face the Bennets anymore. When Peter comes back to his senses, he'd probably want to do the same, but I think he'll be too crazy for a while yet.
Peter could even become part of this "family." I could see Sylar being the mother bird to the broken baby birds. He'd get a kick out of it, he's twisted enough. Plus the empathy-touch power has probably changed his outlook to make him half twisted and half empathetic, and even more screwy than before.
I also wonder about Lyle. The writers have just left him alone so far. Is he another Company-adopted kid? Will his powers be sprouting soon? How will he take his sister killing their mother?
This could go in some phenomenally interesting directions, even if it would be tough to watch because I've always like Sandra. Anyway, I hope Heroes
grows some cojones in regards to their policy of never killing anyone "important," so I would be in favor of this scenario.
And it would explain how Sylar gets custody of Mr. Muggles.