Now, if memory serves, Bethesda has always had an Elder Scrolls game available as a launch title for Microsoft platforms (Morrowind for Xbox and Oblivion for 360).
However, there is no way they will release another TES game by the end of 2013 - they are still releasing DLC for Skyrim.
However, Fallout 4 could be a possibility as a launch title of a new console released by the end of 2013.
Pure speculation, I know.
What do you think?