Is our friendly ghostly making a return?

[Alleluia]

In the media section of the 5.1 site, there is a set of screenshots, one of which shows hoodless G'raha Tia in lakeland. Then above them there are two shots of character models on a white background, one of which is also a hoodless G'raha Tia. This implies that the media, including the model shots, are specifically about post-5.0 content.

My question comes in about the other model render shown: Ardbert. The above logic means that his render being there means he's got something to do with the next patch. Is it possible he's still around? It sure seemed like the symbolism in the final scenes of 5.0 said he was moving on, but now I'm not sure. Not that I'd mind if he's still around. I'd just be pretty surprised.

Or perhaps he's got some past history with the Grand Cosmos and will appear in flashbacks? Do we ever learn where he was actually from?