Expansion One will be the Dark Brotherhood/Thieves Guild at the Imperial City.
Expansion Two will be Housing.
Each will cost about $30 and will be a digital download of around 50Gb.
Did I miss anything out
In future content, I would love to see other continents in the world as well. Also, one thing I always felt kinda let down in past ES games (including this one) is most trips to Oblivion look the same. Igneous rock and volcanic environment. I'd greatly like to see more variety in Oblivion landscapes in future content.