J.K. Simmons initially passed on a role in the Prime Video series Invincible, with reports suggesting he was offered a different character before taking on the part of Omni-Man. It appears that Simmons was sent a script and expressed interest in playing Omni-Man instead. The details of the initial offer and Simmons' decision-making process are not entirely clear, but it is confirmed that he did not immediately accept his eventual role in the show.