I wouldn't mind seeing more of the Jockey in this next movie. I'm 30 years old, been watching these movies literally my whole life (my mom saw the original when she was pregnant), and to be honest, I'm almost bored of the "space jockey mystery". If any other director other than Ridley was doing this next film, I'd say don't touch the jockey... but he's the man, and I'd love to see what he does with it.
But I understand that it is one of the great movie-mysteries... and I doubt we'll see much of the jockey, if at all. A reference or a snapshot would be nice though.