Cool trailer, however, it does NOT beat its teaser in epicness.
[ame]http://www.youtube.com/watch?v=dJwAs8xLjoU[/ame]
Do I have to play the first 3 games to understand the storyline or is it like GTA and the stories are only slightly related?
There are only two other Saints Rows, you don't necessarily have to play them but you will miss a few references to characters and events from the last games if 2 is any signifier. However I still recommend 2, it is a great game.