All these idiot developers jumping on the MMO-brandwagon seem to miss one important point: it's a very easily saturated market, and not necessairily a profitable one.
Production costs are very high, and it has to operate from a narrow target audience: MMO's are basically only for those easily addicted, über-hardcore power gamers (also known as Koreans) or people with way too much time on their hands. These three groups are also, per definition, not the most financially well endowed groups.
And with WoW already taking the lion's share of the entire market (a market that does not really grow all that much: there's a lot of shifting about, but the total amount of MMO users worldwide does not grow nearly as much as gamers in general), these dozens of MMO's in the make right now are destined to fail.
The gaming industry really needs to grow up. They're constantly targeting the wrong audiences (the vast majority of gamers is over 21), jumping on every brandwagon that comes along, and converting niche/unique producs into the same old bland mass-produced crap that's floating around everywhere. I don't get who is responsible for overall Market Strategies at, in this example, EA; but they don't seem overly bright.