I think it will be much like Dungeon Overlord but in 3d :P
Here are some links, unfortunately there are not many informations around
http://dungeonempires.gamigo.com/
http://www.facebook.com/Dungeon.Empires
here are some googlable reviews about it:
http://www.f2pgames.com/2011/01/26/f...ngeon-empires/
http://www.freebrowsergamer.com/2010...n-empires.html