Okay, so at the end of tonight's episode, it says "End of Volume 2"
I wonder what the finale would have been like, if the writers' strike hadn't occured.
I'm not really happy with this season finale, but I guess it's the best they could do with what they had. Parts seemed rushed.
*Spoiler thoughts*
I knew Nikki would die, but I wasn't expecting the second person who died.
The second death was a shock 
I think the Maya storyline is pretty boring, and when she was shot [and temporarily killed] it made her storyline seem pointless as well.
I still don't like her storyline lol.
What's up with Hiro, sheesh, he should have just killed Kensi/Adam, and made sure he was dead - ditto with Sylar.
Both the villians would be dead and so many people saved, if Hiro would just have killed the two of them.
I'm not going to be surprised if Adam's able to escape his current situation, again. He's got forever to try lol
So, Sylar with his powers are back.
That kind of makes all the efforts of season one totally pointless.
I'm looking at you, Hiro 
lol
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Predictions for Season 3
- Sylar will probably kill Maya, and gain her power.
Just end her storyline lol.
I doubt he'll kill Molly, just because I don't think they'd kill a child character in the show.
Elle may face off with Sylar again, but I don't see that happening at the beginning of the season.
- Peter vs. The Company.
Peter's got to be mighty pissed now. I wouldn't be surprised if he tries to take on the company by himself.
Even though Noah technically works for the company again, I definitely can see him trying to take it down from the inside again, and help Peter.
I see Elle eventually turning against her dad at some point, possibly getting killed.
- Poor Micah doesn't have a family anymore.
I can see him and Monica being like a brother/sister family, but I don't really have any guesses where their storyline will go.
- Who will finally kill Sylar?
Maybe no one. Who knows how long they want to keep his character around lol.
They should kill him off, since so far only the good characters are dying [main characters anyway]. 
If I had a choice, I'd say let Matt develop his powers more, and surprise Sylar by controlling his mind, temporarily occupying Sylar.
Then Peter should finish Sylar off. Sure, they could let Hiro try again, but seriously, he wouldn't kill Sylar. He doesn't have it in him in my opinion.