There are rumors for the possible sequel, Night at the Museum 4.
- It may involve the Government noticing the excistance of the exhibits after watching clips of the events of Battle of the Smithsonian, and if they find out they were real, they may leave them outside by watching them burn in the sun.
- The sun may be moved by a hidden main antagonist who plans to start an ice age or see how the world would be without the sun.
- John Goodman might do Benjamin Franklin.
- Robert Garant cannot confirm or deny about the rumors about the fourth film.