http://youtu.be/j4GAs9TJVjM?list=PLP63B9XPsQt0KiUz3ffyiS1tpDywWraPF
Looks like they are gonna have an action packed season. This is the trailer released at Comic-Con. They more or less reveal how they get out of the train car too. If you don't wanna see that, don't watch.
All aboard the hype train for season 5!