Just that he was coming back for Inquisition as Alistair. That was pretty much it, IIRC. Which is why I am trying to temper expectations with Cullen's announcement. Logical part of myself is all "they wouldn't do a reveal like that via the VA's Twitter" and the other part of me is still kinda screaming internally. I can't quite make out what she is saying. It sounds like, 'ASGHFJKJFHSDJ"...
Yeah... can't see 20+ hours if he was just an adviser... (the internal screaming just went ultra-sonic)
Yes, he tweeted that he is recording Alistair for DAI.
Oh, okay, yes, I remember that now.
For some reason, I thought you were referencing something much older from one of the previous two games. Tuesday morning for you, I guess! 
Yeah, this is weird. On one hand, I have an urge to congratulate the Cullen fans because I know they've taken a lot of flak in the past, but on the other hand, if this is really a reveal of a companion and LI, this is a really weird way of it happening.
At any rate, I'm fine about Cullen either way, never really been a fan or hater of his. My heart still holds onto faint hope for Varric, so... meh.
EDIT: Oh, and there's David. Let the games begin. 