People think its going to be tommy vercetti from gta vice city or toni cipriari from gta liberty city stories or it could be ned luke because if you check out the trailer it says i want to settle down and become a good guy.
There is no "cheat" for superman. It is a mod (modification) that sombody made. They simply went into the game and changed and added things, making it into superman. You can download it off of the internet.
He is the main character in GTA VC. He was a gangster in Liberty City. He was sent to Vice City for some drug Deal. But some misfortune happened and now he rise up to become the biggest gangster of the Islands.
No there are not any super hero abilities in gta vice city.You can though make Tommy look like super heroes.You can apply mod by which Tommy can fly and jump very far.He can also kill people in one punch.