The DLCs will supposedly be similar in size to the ones in Fallout3. I guess that means we can look for something with quite a bit of new content like Point Lookout.
Bethesda has already said they won't be full expansions like Shivering Isles though.
Perhaps the first one will be announced next month. I think the Fallout ones came out once every three months or so.
Eh, I still argue that all the FO:3 DLCs were hollow feeling. And they were no better in FO:NV.
An TES game deserves full expansions, not half-hearted excuses for laziness on behalf of the developer.
My point, you ask? The couple of extremely under-powered guns, and... wait... did I get anything else from that DLC..? My point is, there was no content in the FO DLCs. They owe us better than that.