The problem is that EA doesn't have to answer, they've already got all the IP rights. At the moment we are too tiny for them to care about, "they will probably just stop after a while and give up" would be the thought for all projects like us. It is only when we have something and are giving it away that KK would start to appear on EA's radar. Then the pain starts...
A plan would be to keep sending Emails, letters, faxes, telegrams and smoke signals, etc, while working on it. If no reply appears and WftO is near completion then send them some kind of demo and something saying "Hello
(Insert expansion of who we are and what we have created) we are very interested in getting this out, but wanted to know what EA's opinion is before we start putting links up.
Kindest regards
Keeper Klan"
If they still don't reply, well... we'll have to use the all powerful omni-mind to come up with a plan. I don't think it would be a good idea to assume EA doesn't care about the IP and go a head with giving it away.
Another answer would be to create something that is like dungeon keeper but isn't. Kind of like Torchlight and Diablo.