You know, I wouldn't mind if they did something similar to the “Ghostbusters” commercial from the first film.

“We're ready to believe you!”

I would like to see a pseudo-training video style commercial on the finer parts of being a ghostbuster and the ‘rewards’ you gain.

I think it would be great idea to play on the fact that the Ghostbusters are just too old to be doing another movie. Like some live action shots of them filming a fake third movie and film it like a joke documentary of things just going wrong.

For example, forgetting lines, falling asleep, hurting themselves, etc. Then cut to action squences in the game before cutting back to them sitting down in chairs waiting to shoot the next scene. Then logo. I can imangine those guys pulling something like that off brilliantly.