Mercedes-Benz wrote...
Dragon Age: Origins and Dragon Age Awakening:
1. Putting (a) survivor(s) (if there were any besides the Warden and Duncan) from the taking of Castle Cousland by Howe into the game, like Iona (if you didn't sleep with her), Mother Mallol and Ser Gilmore for example.
2. Putting the other origins characters who didn't end up joining the Wardens into the game, since as far as i know only the Dwarf commoner and Dalish Elf are confimed to be dead if they didn't join the Wardens.
3. Bella or Kaitlyn being the wife od Bann Teagan if you gave them enough money to make it to Denerim and start over.
4. Bevin showing up as an adventurer in a side-quest if you gave him back his grandfather's sword.
5. Have Alec and his order of knights appear in the game if the Warden-Commander had him join the army in Awakening.
6. Since the Warden-Commander's sword Vigilance (if you had Wade make it from the materials you collected) was supposedly stolen by the Antivan Crows after the end of Awakening, the Inquisitor should have a chance to acquire in a sidequest.
7. The Silver Order being present in the game if you choose to invest in silverite armor for the soldiers of Vigils's Keep.
Dragon Age II:
1. The ship Isabela could acquire being visitable.
Dragon Age: Origins and Dragon Age Awakening:
1. I'm pretty sure every soul in Castle Cousland is dead as it gets..
2. I'm pretty sure the City Elf, Dwarf Noble and Human Noble are dead .
3. this I doubt it would be nice but I doubt it will be important.
4. This is out there but if he did show up I would not be surpised.
5. If we go to Amanranthine then it's a good chance they'll be there.
6. I would be more surprised if Vigilance didn't find it's way into your hands.
7. if we visit Amanranthine they'll probably show up.
Dragon Age II:
1. I would have expect her in Starkhaven working with/for Sebastion