This link has a ton of info on what the characters will be going through this season. blaugh I can't wait! There's a lot of surprising stuff in there, such as Puck and Mercedes will hook up! And the article also confirmed the impression the commercial gave me, that Kurt's dad and Finn's mom are going to date! It's in a slideshow format and shows all the main characters, and has a blurb at the bottom of what they'll go through this season. It seems Mercedes, Artie, and Kurt will get more attention, and apparently Tina will convince the principal she's a vampire! rofl Holy s**t, I cannot wait!
Puck is supposed to go out with every person on the main cast by the end of the show, so Puck and Mercedes doesn't surprise me. He'll also go out with Rachel again later this season.