I thought MSJ's film was pretty damn good considering everything he had to work with, but the things I'd MOST like to see in a GR sequel...
-Mephisto and Blackheart both returning, BH in his demon form with quick flashes again of M's demon form
-Danny Ketch introduced (NOT as Blaze's brother), makes a deal with Mephisto and becomes VENGEANCE instead of another GR. Hunts down Blaze for M and THIS would lead us into a giant highway/city full on Hellcycle chase...lasting about 7-8 minutes. Both Riders would have to dodge things along the way and try to hurt each other.
-Roxanne would probably have even less of a part in the sequel, but VENGEANCE would of course have to kidnap her, and this is the point where Blackheart returns, in his FULL demon form (comic book form) to battle both Riders and his father. Our finale would consist of GHOST RIDER vs. VENGEANCE vs. BLACKHEART vs. MEPHISTO...with Mephisto now transforming completely into his demon comic book form. I would say this battle would last about 10-15 minutes, with BH eventually being destroyed for good by Johnny Blaze/GR and then Johnny sacrifices himself to save VENGEANCE/Danny Ketch, so both M and Johnny return to Hell, and the film ends with Danny getting ready to venture into Hell to rescue Johnny.
^I know NONE of that probably happens in the comic, but just think about how great of an ending that would be. VENGEANCE would start out as a badass Rider hunting down Blaze, and when he is saved by Blaze, he decides to rescue him in return. GHOST RIDER 3 would show us Hell and VENGEANCE's attempt to save Blaze, and maybe even Carter Slade.
But, I guess that is just how I would do a GR film. Tell me what you guys think.
CAH