I read the posts on qcfdesign.com, and a bit of the stuff on the forums. To me it seems like you are now mostly working on finalizing all the art, finishing the codex, bug fixes, and just general polish. Also on tweaking the special edition content.
If I had to make a trailer I would probably first briefly remind people of their good times with the alpha, then show them the glory of the full game while showing the basics of what you do in the game (explore, kill monsters, level up, kill more monsters). Mostly dungeony stuff, showing off the variety, but also some kingdom stuff thrown in. Not too much text, and not too long overall, maybe something like 2-3 minutes. I'm looking forward to seeing the trailer you come up with!