It is possible, but the problem is making a general purpose RTS is very difficult. It will be as if developing a framework. We will have to consider a lot of differing criteria, platforms. I think it needs more people to do something of that scale. Currently we can make a lot of assumptions about the gameplay and taht will help us to skip a lot of scenarios. But I like your idea of an RTS maker. Like said, someone can fork-off this project and build it in parallel.