What is Bruce Campbell's role?
He's the Maître de at the fancy restaurant, where Pete wants to propose to MJ. Very, very funny. Gwen shows up, a frustrated MJ rages on Pete, Campbell wants to send the band and the champagne with the ring in it, Pete wiskes him away, Campbell barks his underlings away. Funny.
What is Stan Lee's role?
A dumb one. Talks to Pete on the street. Don't remember the first sentence, but it ended with "nuff said". Dumb, Stan sounded very stiff.
What's the duration of the royal battle?
It was shorter than I expected. Few Venom scenes, fans of his will be pissed, as I'm sure of. Maybe 6-9 minutes?
When Brock first confronts Sandman on taking on Spider-Man together, how does he look like and does it show some Venom stuff in that scene?
Venom gets thrown around by Sandman, who thought it was Spidey - Brock was just swinging around to find Sandy. They talk, Brock shows his face, proposes the team-up and off they go. Sandman's motivation is barely noticeable, the movie has real problems here. He later tries to kill Spidey, yet Pete finally forgives him and lets him get away! Sand cloud again.
Brock's dialogue is terrible! No depth, no fun, no poison. Just a jerk who stalked Gwen and manipulated a picture of Spidey and got exposed by Parker, and now wants to kill him. Wow. Bad work by the screenwriter.