Question - Will Skyrim have an ability to play one of these? I think it should have both abilities! Imagine side quests as either the Werewolf where you battle the Undead! Or join the Undead and Slay the Ravaged beast that threaten your very existence !
Also, the Dark Brotherhood! Personally I think these were the most fun, and challenging quests in both Marrowind, and Oblivion! If the Dark Brotherhood was to be left out of Skyrim I would feel a great sarrow in Skyrim. Although I wouldn't play the game the save as I did Oblivion or Marrowind.
ENDING: Fellow Elder Scrolls players and Employees, we must have all this content in Skyrim! If this content isn't in Skyrim I think I can speak on behalf of the players there will be a great disappointment, and the constant thought of how it was in Oblivion, and Marrowind. Thanks for your time. Please Bump this thread up, and comment your thoughts on everything. We must make the Employees see we need this in the game!