my money is on the ides that they are. but yeah here's what i reckon would be a good one.
ok how a bout let's say after you've done the MQ whil exploring a long forgotton cave you find.....wait for it.. the necronomicon or the TES version of it.
i mean wouldent it be great to have a necromancer storyline
you could have
1. maybe have the option to become a lich
2. maybe just maybe you could meet/kill the real manimarco and take his place as a demi-god
3. also you could raise an undead army to try and take control and proclaim yourself the king/emporer of skyrim
that would be sweet
or...
you could go back to the shivering isles and if you have a save from oblivion you can maybe meet your own character
1. he could give you quests to help him stop jygalag from taking back his lands
2. just imagin the the insanity of the people with the new radient AI
3.after you've conquerd skyrim you can decide to double cross your old player kill jygalag take the shivering ilses for your self
hope you like if any one wants to here any ideas or stuff pm me