Choose any character with flying skills and go to the right part of the arena. Then fly up on the platform to find the Mandarin (Film) Character Token.
Deadpool Red Brick
Choose Magneto to decompose the blue metal cage on the left side of the arena, then take the "Attract Studs" Deadpool Brick to collect coins.
Stan Lee in Peril
Switch into Spider-Man and go to the right side of the arena using your sixth sense. You will find two attachable points - pulling them will reveal a golden wall. Melt it using any character with a fire beam.
Choose Galactus or other character with telekinesis power and pull out Stan Lee from the giant black hat.