Baseless speculation here, but my gut tells me that Microsoft is going to put a remaster-focused studio to task on a current-gen Morrowind/Oblivion/Skyrim triple pack, a la the Master Chief Collection, to tide people over.

Remastering Skyrim is the easy way out, but Oblivion is still trapped on the 360 (if you don't have a PC) and Morrowind is the darling title of the franchise that people would love to see remastered (and was recently used as an example by Nvidia on "how to remaster a game"). Remaster the earlier two and then just shove the Xbox One copy of Skyrim Anniversary Edition in there for funsies is something people would get behind, more than just another port of Skyrim alone.