In my search for a supported replacement for WAB, I found War and Conquest:

The proprietor of WAC, Rob, does have a supplement that he made for fantasy gaming as well. While I do contend that this this is a supplement, and not specifically core rules, I tend to think that this is another avenue to look into. More specifically of someone is looking for a set of core rules that work in both Fantasy and Historical, which is what I am looking toward. Having said that, I would like to see how Oathmark is shaping up, along with Conquest, and Conquerer. At one time I was looking for a list of fantasy mass battle games, and realized that there are a ton of them out there. Many of them are just not my taste. Only time will tell how popular one set will be.