I just don't understand why they didn't just call it Mount & Blade II. But yeah, ofcourse there is not going to be a gameplay trailer out all of a sudden if they haven't even officially announced the game.
If they were able to make Warband, I have every bit of trust that this will be a good game aswell. I just hope they will expand upon the solid basis that Mount & Blade has always had and not try something completely new to appeal to the masses. Though with the good community contact they've had in the past, I'm sure they will not fuck over their old fanbase.