And this is just a theory.
But I've noticed Fallout 3, Fallout New Vegas, and Oblivion all has never passed over 75 achievments.
Oblivion at 60
Fallout 3 at 72
and Fallout New Vegas at 75, there's deffinitely a pattern..
Skyrim is now at 75.
They increase the ammount of achievments with each new game. So maybe this could be a convincing theory to prove that there are more DLC to come?
I don't include Hunted the Brink, Demon's Forge, Rage, or Dishonored,ect. because they are in a seperate category of their own.
Not saying they're TRUE Betheseda games, but that they're not working off the same engine, and aren't as popular as The Elder Scrolls and Fallout.