Question says it all! Keep it clean! 
Surprise, surprise, I’d hang out with Howie. We’d do some super sleuthing à la Webbed Wonder!
Tony Stark. You could do just about anything thanks to his money. He’d probably be a decent wingman. And if nothing else you can probably get him drunk and convince him to let you try on one his many Iron Man suits.
Kamala. She is probably the biggest comic nerd in the game. Fun conversations would follow.
Gwenpool. Great costume and great personality. Would be fun.
Probably Deadpool. Absolutely nothing would be off the table. I may not survive, but it would be a blast.
The 5* characters are the cinematic versions of each character.
5* Black Widow = Scarlet Johansson
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Totally awesome Hulk, and I take him to a casino to win big!
Brigby. Just to see what he has to put up with.
When did @Brigby become a MPQ character?! 
Squirrel Girl. Or maybe Thor. But probably Squirrel Girl 
Deadpool. He’s the only one who knows what we’ve been doing with him all this time.
Obviously when he signed his organ donor employment contract.
Punisher, just to see what bad guys we can put down.
Mystique, why limit who you’re seen with to 1?
Devil Dinosaur. I put him on an island and charge people to see him. $$$
Then I could compete in PvP.
What power set would Brigby have?
Silver Surfer…I could hitch a ride through the galaxy. Or maybe I could convince Thanos to let me try on his infinity gauntlet?
I’d probably say Squirrel Girl because life needs to be goofy from time to time.
As honorable mentions, I’d include Devil Dinosaur because dinosaur or Peggy so I could ask her what she has against Wasp in her Crash…
Surprise, surprise and fear, fear and surprise, fear, and surprise, and ruthless efficiency, and an almost fanatical devotion to the Pope.
All passives, all pink.
Glitch in a Boss Event - 9 
AP
Brigby turns himself and his team invisible for 1 turn. The enemy team gains a heroic token at the end of the fight.
Max level: turns himself and his team invisible for 3 turns.
Moved! - 8 
AP
Moves the target character to the back of the enemy team and converts random basic tile into a “Closed” special tile. As long as the special tile is on the board, all damage from the targetted character is reduced by 25% and his AP gain is reduced by 25%.
This tile can’t be matched or destroyed and is only removed when it reaches the bottom of the board.
Max Level: damage and AP gain reduced by 100%
MPQ Giveth and MPQ Taketh Away 10**
AP**
Heals the enemy team for 1000 hp and converts the four corner tiles into friendly strike tile with strength 125.
Max level: Heals the enemy team for 3000 hp and converts the four corner tiles into fortified strike tiles with strength 300.