There's a lot on your plate currently I'm sure, but with all of this new content, I think there should definitely be an updated trailer, and a way to keep it off of your shoulders could be hold a competition among the community to make their own and submit it. Prize could be cosmetic (for characters or a statue or something) Lets face it, you've added a ton of stuff to the game since the trailer was made, its outdated, its the first thing people look at, and in all honesty is not very enticing (to the people I have shown anyways).
There's talent in this community, utilize it!