Well, I figure since there might be people out there who don't want 400 Days spoiled in any way, we should make a thread for potential theories based on the trailer in the Spoilers forum.
(Link to the trailer: https://www.youtube.com/watch?v=icXre05VFx0)
We'll start off with the potential return of Kenny.
It's blurry, no doubt. But there were a few people speculating the truck driver could be Kenny. I'm not entirely convinced, since it seems like a few of these stories are from the start of the apocalypse. If that's the case, it doesn't make sense for Kenny to be there.
On top of that, Russel seems like he's in pretty good shape despite the end of the world. His clothes are still in decent repair, he has no stubble to speak of. There are still a few corpses lying around, but I'd guess this is fairly early into things. Then there's the logistics of Kenny getting a working truck after what he's been through, and in Savanna of all places. We're lead to believe the scavengers in Crawford dismantled pretty much every vehicle they could get their hands on, so Kenny would have to get pretty far from there to find a working vehicle.
However, assuming that not all of the stories are in the same timeframe, and ignoring the other details entirely, there's that small chance that Kenny escaped and found a decent truck. The odds aren't in his favor, but if anyone can do it, it's Kenny. Thoughts or other ideas?
Edit: If you find the image too small, the time in the trailer when the truck appears is ~37-38 seconds.