'This town certainly has changed, and not at all for the better'

[Berethos]

Isn't Amdapor the most likely place. All of the bosses from the Hard ,nose were in the trailer.

Architectural style doesn't line up for the section with Thancred in it. The environment around the WoL might fit, but if it was where Amdapor was then it's been leveled - the few times you can see the surrounding environment it's devoid of structures.

Also, much like with Halatali, I don't see Thancred commenting on it in the manner that he does if it were Amdapor.

Based on the architecture and his comments, I don't see it being any location other than Ul'dah (and much like parts of the HW trailer, more representative of the location than an accurate rendering of the places we can visit in-game).