Briefly spoke to Gaius van Baelsar voice actor today, got a small spoiler from him!

[Marisa]

So I got to talk to Richard Epcar for a moment today, and I asked him about his role as Gaius. He had no idea if there would ever be a return of Gaius, but he said he loved the character and would jump at the chance to do him again. BUT! He told me he's been recording for Heavensward, and he's the new big villain for an upcoming patch. I didn't hear the name well, but it sounded like Ailur (he pronounced it "eye - lur). Not a ton to go on, but we know Richard Epcar is back, and he's the big baddy again. So that's something!

[Seriphyn]

He was easily my favourite VA of 2.0, this is nice to hear. Lucky you!

[Dravus]

Interesting! I wonder if this 'Ailur' will be another Garlean? It seems like a name that fits their conventions...