The voice at the end of the trailer sounds like Elidibus, even in English. I think the confusion may come from the fact that the more recent voiced lines from Elidibus-possessing-Zenos were actually spoken by Zenos's voice actor giving a more sedated line delivery.

Here is the one scene where Elidibus's Heavensward-and-onwards voice actor has been heard, back in 3.0:
Video

Compare the trailer (timestamped).

Sounds definitively the same to me, just as in the Japanese version.