4) Crisis On Infinite Earths (DC TV/Movie Crossover)
The Crossover: In contrast to Marvel, DC’s movies and TV shows are categorically not set on the same world. But that hasn’t stopped fans from wondering if TV’s Barry Allen – who has traveled to many different earths in the course of The Flash – will one day stop over in the DCEU and meet Batman and Superman. If DC were interested in doing that, the story to do it in would be an adaptation of Crisis on Infinite Earths, a classic comic book event which involved the Flash and a threat to the Multiverse.
Likelihood – 3/10: Let’s be honest here: this one isn’t very likely. No matter how cool it would be and how integral alternate universes are in DC comics, we don’t really expect to see the likes of Stephen Amell, Grant Gustin and Melissa Benoist reprise their roles on the big screen. Like Marvel, there is also the problem of scheduling difficulties. On the other hand, Geoff Johns oversees both divisions of DC Entertainment, so maybe if he really wanted it a crossover could just happen.