So Bryan Singer hinted at this awesome Marvel Mashup Movie Idea, and I am here to stage and predict this idea in an exclusive fan point of view. This is the first part where I have created a fictional trailer description for this film.
Film Title: Heroes United
Trailer Length: 3 Minutes
Trailer Description Idea: So the trailer begins with Wolverine on a motorcycle chasing after some bad guys in a car. The four dudes in the car are wearing luchador masks and nothing else. So they stop at a gas station and the dudes in the luchador masks run inside. Wolverine parks his bike out and walks to the door. He opens the door and the people in the masks pop out with shotguns. They yell something to him inaudible. Then Wolverine pops out his claws and says, “Suck it.” Then Wolverine in a quick motion jumps and pops all their heads off with his claws (It's blurry so it goes by quick to ensure PG rating). Then we hear them dropping one by one. Then Wolverine walks out the gas station. Pool of blood comes through the bottom of the door. He starts to walk back to his motorcycle. His motorcycle blows up. Suddenly Wolverine looks up and the sky goes dark. A loud boom sounds. Then suddenly something silver blurs by him and lands in the distance. He lands a silver surfboard on the ground. He looks towards Wolverine and walks towards him. It's soon revealed through the clouds of smoke it's the Silver Surfer! Wolverine walks towards him. They both stop in front of each other. The Silver Surfer speaks, “There is a greater threat at hand, I need your help to gather all of the heroes in the world.” Wolverine replies to him, “Why should I bub?”. Suddenly a giant futuristic looking purple boot suddenly appears and stomps the entire gas station. Music blares louder. Another boot appears. It slowly walks by them. “He has come,” The Silver Surfer says. Then it fades to black. Then the title card appears “Heroes United”.

Music playing in trailer: Two Steps From Hell - Iron Wing
Thank you for looking, Part 2 will be a story and character idea. Part 3 will also be coming too. Just to remind everyone this is a fan perspective and not the actual thing, as I know this may not happen this is only a fan prediction of how the story could be done.
About The Author:
Just a friendly face and a good heart fellow!