Tabloid Tidy Up
You will find Stan Lee under the pile of sand in the right side of the room. Choose Wolverine or any other character with claws and dig a hole in that pile. This will set Stan Lee free.
A Shock Withdrawal
After luring Shocker out from the vault, enter it and switch into Magneto. Open the metal cage with Stan Lee trapped inside and let him find the way out.
House Party Protocol
To rescue Stan Lee, walk to the right side of the room and melt the gold bars with a fire beam.
Finally go to the big door placed between the stairs. Choose Magneto to break the door open and release Stan Lee.
You may rescue Stan Lee with an Iceman - simply go to the fireplace and put out the fire.
Put Up Your Dukes
Turn right in the back of the room. Choose Magneto and lift off the metal weight to rescue Stan Lee.
Stunt Show Surprise
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.
On the last stage turn left as a character with claws (e.g. Wolverine), then dig out the elements of F.F. Panel from the sand pile. Put them together into one object and - as Mr. Fantastic - use it to rescue Stan Lee.
After you scare away Dormammu from the shower, switch into Spider-Man or Venom and use the sixth sense. Now find the web handles - pulling them will create a hole in the ceiling. Go through it to the upper level.
To rescue Stan Lee, choose character with rocket attack and shoot at the silver padlock on the coffin.
The Thrill of the Chess
Choose any character with electric powers and charge up the battery placed near to the cell on the left. You will set Stan Lee free in this way.
To rescue Stan Lee, choose Magneto or Polaris and - with their special powers - open the metal jaws placed on the right side of the gate.