I honestly think they don't know what they're doing. This will stay vapourware.
Even though M&B and Warband had sold like cupcakes, the only thing he released these past years was fire and sword. I am willing to bet this turkish guy used the money on hookers and blows, and is capitalising on the Title alone to sell. This game might just be an HD warband, if it ever gets out.
A) They've been working on Bannerlord for at least a year now, probably longer.
B) Taleworlds did not create With Fire and Sword. The history of that game is interesting and tragic. A rather bad studio in the Ukraine (Snowbird? I think so) made the first version for MnB, when they licensed the engine from TW. Then they ported the sorry excuse for a game (rather a mod) to Warband and released it again. It didn't do great. Then Talewords started to work on WFAS as well, trying to fix it, while still patching Warband and later working on Bannerlord.
C) They also had to work on Napoleonic Wars later, when that mod got released as DLC. (probably pushed by Paradox, similarly to WFAS)
It seems to me like they've been waiting for an entire year in silence for a reason. They're no longer associated with Paradox, which is interesting. Paradox pulled a massive dick move last year, when they pretty much said: "We're having another studio make Warband again, but prettier. Deal with it." and announced War of the Roses. That also didn't do great. I think TW was contractually obligated to wait with Bannerlord stuff a whole year after the announcement, not to hurt the sales of WotR or something of the sort.
Now there's also going to be War of the Vikings, which looks even dumber than WotR, so in theory that's direct MP competition to Bannerlord. Good, if it's anything like WotR, Taleworlds have nothing to worry about. Plus their game will have the singleplayer campaign.
D) The first hints of info they're letting out on the forums seem to be related to modding and how much they've improved the editor/module system. So far it doesn't seem to be a mere HD remake.