Anticipate Teleport: Where Do They Go?

[Ridley's Cohort]

Actually, Antimagic doesn't extend from the Prime Material to the Astral Plane, so they will arrive just fine and then find themselves in an Antimagic Field.

You are presuming a number of things that may or may not be true. That is one reasonable way to interpret the situation. It is not the one I would use.

 

[Someone]

I'd say they go to the exact same place people under a time hop psionic power go. The effect is actually quite similar.