*link removed*
This post was made on [censored] a few months back, and normally such a thing should be taken with a grain of salt.
However, considering the posting got two unlikely pieces of information correct before TESV was announced to even EXIST (that the game was taking place in Skyrim AND was being done on an in-house engine), makes me feel like these rumors have some actual validity.
Mods: I apologize if this sort of thing isn't allowed to be posted here, but I didn't see anything on not posting such content so I think this is okay.
EDIT: "Elder Scrolls Tempist" would likely just be a working title if what the guy in the post says is true. Along the same vein of "Project Natal" ending up being "Kinect"