I did not really enjoy the mechanics they introduced in dead money. the saw collars were very annoying forcing you to play very strategically looking for speakers and radios taking away the open endedness. i do however found the story and background elements you find about the sierra madre very interesting. all the new weapons like the BAR and bearclawfist great plus the multiple other new weapons although are pretty minor like the cosmic knife and police pistol.Also NEW PERKS!  i managed to make it out the madre vault with 4 gold bars i put on my bed in the 38 as caps pretty much became meaningless toward endgame. 
anyways it hinted that you might be fighting with another courier in the future. possibly in a place called the Big empty. One thing i would want is a big money sink maybe another house to buy as my caps just keep piling up in addition to the 40k in gold i have.

Ulysses is the other courier that is mentioned in the DLC. He was a companion that was "cut" from Fallout: New Vegas before it's release.
 
The next DLC will most likely take place in the Divide ( Grand Canyon) not the Big Empty.
 
I'm really looking forward to the next DLC, even with all the in-your-face foreshadowing.

yes i thought it was weird the cowboy robot in the sunset sasparilla had the same name as the burned man i thought that was a small oversight

Only DLC I give a shit about is post-ending.

" Only DLC I give a shit about is post-ending. "

I feel like the reason they pussed out and basically had all the endings in FNV converge into basically the same thing (Brotherhood dead, Khans gone, niether NCR nore the Legion wiped out completely no matter how you choose) is so they could have some post ending shit come later. So I look forward to Mr. House/ Yes Man/ NCR sending me on basically the same post ending mission some time in the near future.

I am kind of hoping they have a DLC that is based in New Canaan. The Crimson Caravan talked about them a lot, so it could be a possibility...

I was thinking of "Return of Frank Horrigan" where a hidden Enclave base has revived him and are planning on to take over New Vegas under the NCR feet, but you and a brotherhood black ops team will have to stop them.
DLC that is based in New Canaan sounds pretty good too.
I would like to learn more about the Big Empty.

Did some research and found a possible character that not just may be in a future DLC but will be mention throughout the DLC packs:  http://fallout.wikia.com/wiki/Ulysses