There are a lot of MMO's on release..and I do hope, that there is something that come's along that is comparable and has a large community such as WoW. That is what make's WoW successful is that community, the constant updates from Developers and such..and only a FEW companies do this.
What makes WoW huge or what made it huge, wasn't really the community, it was the low system requirements and an IP that was well known, backed by a company that had another IP that was a dungeon crawl. That game was the buggiest MMO I played at launch, I remember servers being down for days, and a ton of other issues. They didn't really get everything straightened out for a good 6 - 7 months after release. But at that time that is what was expected. MMO's released with a ton of missing content and a lot of bugs and people just expected it to get patched in.
When it got patched in the game started to boom in the beginning of 05 and then they kept up on patches mostly, then BC came out and they made the game easier and pulled in more people who never played MMO's before, then repeat that for WotLK. Loved the game, played for almost 5 years now, but its easy, liked Pre-BC.
Now for an MMO to be successful people expect it to be a finished game at release, and if it isn't finished people will just go back to WoW, like what happened with AoC and WAR. I think Bioware has what it takes to release a game like this, at least I hope. WoW's community really isn't that huge, at least not in the US and Europe, yes 12 million subs, but I think almost 7 million of those are in Asia. So to get a game with 5 million subs elsewhere is a big task, it's not that huge, as most IP's dont have the global strength like Blizzards games have, but have huge strength in the US and Europe.
Well he has all the books in his Forgotten Realms series (which is a lot), but Icewind dale and others have already been done. Could be something like his DemonWar stuff. But I have the feeling it will be something new also.
I havent really read any of his books, I'm not much for reading
But I know he is a huge name. I still hope its a new IP, the other issue with current IP's is the author giving things "thumbs down" that would make the game great. When creating a new IP they have free roam and don't have to worry about an awesome idea getting shot down, they can just fit it in the storyline.