No Cheapy, Iron Man was not dead serious and managed to succeed as a pretty great movie.
The reason why Green Lantern looks so likely to be terrible is because they're showing like 12 supporting characters, and 3 villains. It looks like they're trying to blow their entire Green Lantern load with one movie instead of just telling a good origin story.
Regarding the cag E3 party, the only quiz question you would really need is "What's your CAG user name?"
Also this might help with the overflow of people attending, from their website:
"Dress code is strictly enforced. No shorts, flip flops, baseball hats, athletic wear, including jerseys, or overly baggy clothing will be allowed."
Maybe half the people attending will be turned away at the door?