And not just any Gundam, but the Gundam, as in the RX-78-2 hero mecha from the original 1979 Mobile Suit Gundam anime TV series.
Nevertheless, Ready Player One has gone with the venerable first Gundam, and even uses two separate sequences of the trailer to show off the anime connection.
For example, Japan hasn’t been all too terribly psyched about the upcoming Ready Player One movie, as the source-material novel doesn’t have that large a Japanese fanbase.