Alrighty my dilsnufas (try and get *that* reference will ya), this is the trailer played last night as best I can remember it.
First of all, there was not a single glimpse of Lex or Lionel or anything. From the preview, it looks like this is entirely about the clan of Smallvillians trying to get Clark back. It has a lot of flashes, and I don't remember the order, so bear with me. First off, their seems to be one big scene with each major character, but separately, except for maybe Pete. Second thing, yes, there is a kissing scene with Lana, but I think it may be with Red!Clark, what with the amount of action there. She asks him to come home, he says he has no home, blah blah blah. The interesting thing is it appears he doesn't wear the ring all of the time and only puts it on when he wants to do something, in this case it looks like going out and robbing banks in a ski mask while laughing at the harmless bullets the police shoot. The scene I know all you Chloe fans out there will want to see is the one with her...obviously. :P
The Chloe scene shows two things. Her arguing with him about something in a hotel room, most likely his, and then him getting angry and slamming her into the wall by the throat and yelling for her to get out. He seems to do a lot of yelling.
The most interesting glimpse by far though, happens after he screams through the phone that they aren't his parents and never will be. The glimpse is this. Jonathan shows up in the middle of the night in Clark's upper floor apartment or hotel room, whatever, tells Clark it's time to go home, superspeeds over to Clark, and tackles him out of the window. Now that was sweet. Now, it involved two rather quick glimpses, so maybe it wasn't Jonathan doing anything of the sort, and he just somehow got Clark off balance enough to tackle him out of the window. Either way, very cool.