One of the biggest disappointments I had with PROMETHEUS was the fact that it didn't include any footage of Guy Pearce as a younger Peter Weyland.
I loved the whole TEDTalk sequence in the futuristic arena, and that's why my copy of Agent9's PROMETHEUS:Special Edition fan edit is my go to version, seeing as it's included at the beginning.
As I still feel that Pearce deserved a moment in his prime in the original, I'd be more than happy to see even a flashback involving him in some way in the sequel. Not that I think his character will be included again in any way in the next one, but who knows at this point?