That's really naive of you to think there will be less DLC's or no more made at all. It's all about the money. They could make more money of the DLC's than the game itself and although they may be a smaller team, the basic structure of the game is there, they only have to add more quests and design a little (by Fallout standards) map. You get just a single person throwing together quests and maps with the G.E.C.K who have next to no experience or training and they aren't getting paid to do it. Put a team together and it doesn't take nearly as much time as you think to spew out little episodes for big bucks.
The chances are a couple of the DLC's were made before the game was even released.
This is a great chance for them to milk as much out of this game as possible and don't think for a second they won't make the most of it.
You should re-read the post, my comments make no assumptions or even suggest that they wouldn't Wan't to make more DLCs, its a matter of resources.
Your suggestion that DLC's are so simple to make is without merit and profoundly un-true, making a DLC requires a team of people and alot of resources and is far more complex than you are trying to suggest. Voice acting, writing, editing, testing, etc, etc, etc all have to be done. If it was as simple as you are trying to suggest, Bethesda could have made a Dozen DLC's for Fallout 3 with the staff they have. We got 5.
If I recall the interviews correctly each DLC team was about 40 people. Even if its half that size, its alot of people, alot of money and not simple to do. I would certainly hope for lots of DLCs, but given that I DO have a wee-tad experience in making games/mods, I'm pretty confident in saying that we will likely get Less than 5, hopefully at least 3. It has nothing to do with a desire to make money, and everything to do with how fast the companies can pump-out DLC products. Do some research, read-up, you'll find as I have that developing even an DLC is Not a 1 or 2 person job.
Miax