Trivia: At Villain-Con, right after Scarlet Overkill throws the wrestler off the stage and down the stairs, as Kevin, Bob, and Stuart turn and run back up the aisle, the host of The Dating Game they were watching in the department store can be seen seated to their right.
Trivia: All 899 Minions in the film were voiced by the director Pierre Coffin.
Chosen answer: The writers wanted to keep Gru's cameo at the end of the film a secret for the fans of the franchise. So, saying "42 Years B.G" (before Gru) in the trailer doesn't give the surprise away.