I would like the Aedra and Daedra to wage war between themselves and the occupants of Tameriel. I would love to see Molag Bal lead the vampires, and Hircine the werewolves. Namira lead the Undead and etc. Your charcter is caught in the middle with only a few Daedra or Aedra willing to side with humans to battle both groups who want to conquer all at any cost. The others lost faith in the humans loyalties, and want to reign with terror. Claim the Daedric and Aedric weapons upon defeating them.
Aedra a Daedra experiences should be like the feel of fighting Skyrims Dragon in scope.They will be giants in scale. Absorb their souls or essence gives you perks, and elevate you to a god status. This also is good for developing followers and regions worship you.
This is insane. The Aedra are much weaker than the Daedra, and the Daedric Princes cannot be killed.
Add to that it all sounds very juvenile and cliched, really. A big mindless battle with no reasonable character motivation as to why they're fighting but with huge giants and presumably some manner of explosions.