I found a voice actor who does a top notch Hayden Anakin impression, so we’ll see how that pans out. AI voice generation is also a possibility, though I’d prefer an actor cus you can get the necessary emotionality much easier.

If I go with an Actor I would probably not use any existing Hayden audio, just to avoid the viewer’s ears clocking the difference. As much as I love Hayden’s delivery of “May the force be with you” in RotS…

Knight of Kalee said:
I know the wider canon does not matter but I believe there’s some place where it’s established Force ghosts could only talk to willing light-side users.

Even if that’s not the case, that’s kinda what I’m running with. Kylo Ren could never reach Darth Vader because DV only exists in the memory of the darkside. So it’s only when Ben has begun to let go of Kylo that Anakin is able to speak with him.