The CW's Arrowverse is an incredibly successful television universe that has been growing ever since the debut of Arrow, all the way back in 2012. Even after the Crisis on Infinite Earth's crossover event incorporated more than a dozen iconic DC properties, such as Black Lightning, Stargirl, and the DCEU, there are still plenty of movies and television shows that the Arrowverse could crossover with.
Also, the Arrowverse is no stranger to making these special fan service moments happen. Before Crisis on Infinite Earths, previous and current DC shows The Flash (1990), Constantine, and Supergirl were all brought into the fold.
With another Arrowverse crossover being planned, this could be the perfect time to add another show or movie to the mix.
And before you say that some of the entries in this gallery are impossible to incorporate, just remember all of the other incredibly well-known properties that the Arrowverse has included in the past.