This is just a thought, but I don't know if from a business standpoint if giving free DLC for pre-orders is a good idea. Sure it will generate a few more pre-orders but it might also discourage people who buy postlaunch to buy the game because they will be paying the same price for less game. Just a thought I had, I'm not claiming to know if this is true or not or if its a bad idea at all, just something to think about.
Anyhow, it looks like a fun game and a 60 hour playthrough is a pretty damn good time, that's basically a dollar for each our of gameplay which is more than a good deal. I just hope they don't just make it a rehash of the first game by not changing a bloody thing, but Gearbox is a good developer so I have some faith in them.