With that said, I think a dlc that takes place in a part of Cyrodiil would be great. It would not require as much effort/work either since they could use of the models from Oblivion and such. Small towns such as Bruma etc.. could be added too. We would be able to revisit the children of those whom we had met back in Oblivion and it'd be great. I'm sure we all miss Cyrodiil and it's great weather. It could be great and I am sure plenty of us had great memories from there. We would be reminded of those and it could be a great experience for most of us im sure.
Oh and a half or quarter of the map would be fine really. I am already aware of the fact that the entire of Cyrodiil would be too big. The Imperial City alongside some smaller towns such as Kvatch and Anvil etc.. and of course of landscape/wild life alongside the towns.
Also, keep in mind that Cyrodiil probably has changed after 400 years.. It won't just be a ''step'' back into the 2008 old Oblivion.
And no, I can't just play Oblivion either - I wan't to be in the current Cyrodiil. The Cyrodiil in Oblivion is 400 years old and I have already explored it.
Feel free to share your thoughts and what not.