Just get the word out, people! Post it everywhere and sing its praises! Try to make everyone get why this is different and interesting. Grassroots is important.
You know sorry to say but this game looks like a fleshed out Warband mod, its by design a spirital successor to cRPG. Which is great, but I can't even honestly say I know what is making it different and interesting with the info I have, since I haven't gotten to play the game's engine and there's no demonstrations of skillful depth released yet.
Like if you can present a video showing the potential of a duel between two good players or the frenetic action of line combat/mosh pits or mechanics of cavalry and so forth that'd be something different. I keep hearing about the combat but not seeing anything. But ultimately I get the feeling this is still being presented in the shadow of Mount and Blade and will just be endlessly compared to it. So I can see a PR dump on Bannerlord deflating any momentum you guys might build up, since Bannerlord is a big unknown by the more or less undisputed current champions of the genre.
I fully expect M:BG is gonna be polished and play well, but it would definitely be a good idea to having videos demonstrating core gameplay, and exactly WHAT is setting it apart from Mount and Blade. Narrate a duel between two good players (so not devs lol) showing some techniques and crap. Show how heirlooming gear changes and personalizes the model. Do a walkthrough of building a character's stats and demonstrate with gameplay footage the different playstyles it accomodates.
Don't need all this now but I'm saying keep it in mind for future content that fans can share with gaming forums or other networks.
edit: will accept consultation fees for ongoing social network messaging coordination in the payment form of future CD keys to give out in streaming contests and the like tia (integrate twitch)