Overlapping doesn't concern them, and I guess media exposure of any type is over all good for buisness. Diablo didn't really belong in the MMO arena and the sacrifices they make from gameplay to make MMO's would severely disappoint me. (Arena of one guy attacking thirty monsters to thirty guys attacking one monster really isn't my thing.) I must say I do find it an interesting prospect of a new game series coming out in the future, perhaps better than all the ones before it; only time will tell.
Damn Im just gonna find this guys posts and quote him all the time lol. You take the words right outta my mouth...always