Making a division consists of more than just a lot of eGO people having the same game.
I don't remember the exact specifics but for eGO to add a new division there are several things to consider. How large is the multi player community, are they eager to be recruited and do eGO's ideals and rules fit well for the game? They go something along those lines.
However, that is not intended to stop you from playing other games with eGO members. C&C has a pretty large following on our website, which makes sense because it's a great series. By all means coordinate and play it with fellow eGO members! We don't have to have an official division to have a great time with each other...heck when Age of Empires II HD comes out that is all I will be playing lol. The more the merrier!