Not to be a buzzkill but I imagine this mod will seem successful in its first few days but I fail to see how it will be sufficiently different to NW. This could easily be done on NW through some custom maps and a reskin pack surely.
As much as I hate to say this, mods for NW die really fast. Perhaps this would work better as a reskin pack.
Mods die quickly on NW because there has yet to be a good mod yet. When Iron Europe was released the amount of people who logged on at the same time broke the site. This goes to show you that the NW community is interested in a great mod but this had yet to be delievered. Iron Europe, North and South, Anglo-Zulu and Blood and Iron were all mods made in a time period where Mount and Blade does not work. While BaI/NaS are both being worked on I sincerly doubt (as much as I would love to be wrong) they will succed because of the time period that they chose, plus a number of problems with those mods.
1812 is good, but it does not have the limelight nor the features which would make people switch to a mod which is pretty much the same as NW but in North America.
I am certain that if a truly great mod was made for NW (preferably during the Napoleonic Wars) then people would play it, so long as it was better then native NW.