it probly wont be alot to start
what was said is basicaly they can do 1 of 2 things
1) save all the quests for 1 big update
2) release them as they finish them so we have a little more to do each update
guess which one they are going with? thats right #2
It might suck, but from a business standpoint #2 is not recommended.
A few quests trickling in will not bring any of those waiting on the
fence back. And it will do little to keep the active playerbase
(which is worth no money atm). They have proven that they cannot
be killed off anyway.
If I was SE, I would release as little new stuff as absolutely necessary
until the PS3 launch, and then come forward with one huge, massive
booming, game-changing update. I believe they will not play their best
cards until they can play them all at once to turn the carriage around.