WTF?
Who cares how many mods have been based on a given subject or timeline. There have been numerous Rome-based mods, but what if the RS team had thrown their hands up and quite because there were "too many mods around Rome"? We'd have no RS2, would we? What if the RTR team had just said "it's been done already" and quite? There'd be no RTR VII on the horizon.
Forget what Bull3pr00f says, he talks nonsense 90% of the time.

You should make the mod about what
you want it to be about, don't worry about how many mods out there are based on similar subjects.