@Zappara
I had a look at Dom Pedro II's new work and it sure seems quite big. It seems that his work or at least some of it will be integrated in WoC. I believe that if this Civ4 Modding community is going to thrive for several years to come, WoC will take a central role at some point. My belief however is that it might be easier to build a mod on WoC as a base rather than to port a mod to WoC. In the case of a huge mod like RoM this can be too much work. The advantages on the other hand are numerous. You will have a great number of extra XML tags to play with. You will be able to use a large number of resources, religions, and corporations without worrying about the #$%^^&%^ GameFont files. All external components that your fans ask you to integrate into the mod will be there with a convenient way to turn on\off any of them. you won't worry about merging, or updating them. In short this project once in a stable usable state will be the modders heaven, and I expect that it will allow more modpacks and modcomps to be created.
It however depends on what you feel you like to do next. If you think it is time for you to move on to a new project, then by all means go for it. We are all here for fun in the first place so if you are gonna have more fun working on your next project you should get started on it. In the end of the day there will be something for us all to enjoy and I am quite sure that whatever you have in mind will be yet another great mod like RoM.