'Crisis on Infinite Earths' pays tribute to its original writer Marv Wolfman with a cameo
The Arrowverse has always paid tribute to the comic creators who inspired their characters. They've renamed buildings, and streets, even in-universe characters after the comic book creators who inspired stories the Arrowverse covers today. With all the big cameos on 'Crisis on Infinite Earths,' the biggest crossover event in TV history pays tribute to one of the men who inspired it all: Marv Wolfman, writer of the original 'Crisis on Infinite Earths'.
Wolfman and George Perez wrote 'Crisis on Infinite Earths' in 1998, a major crossover that attempted to simplify DC Comics' timelines and multiple Earths by combining the myriad timelines into a single universe. The series featured the Monitor gathering heroes of different Earths in order to fight the Anti-Monitor, who sought to destroy all life and replace it with an Anti-Matter Universe. In stopping the Anti-Monitor, the heroes of the universe managed to create an all-new Earth that merged other Earths and histories into one.
Things happened in much the same way on the CW's 'Crisis on Infinite Earths' — after the Paragons and Oliver Queen (Stephen Amell) managed to stop the Anti-Monitor (LaMonica Garett) at the Dawn of Time, the power of the Specter was used to reboot a new universe, shaped by the Paragons' wills and memories.
In Part 5, the heroes wake up and find themselves in the new universe — with their Earths merged. National City is now on the same Earth as Central City, and Supergirl (Melissa Benoist) and Flash (Grant Gustin) apparently team up all the time, in this new timeline. One of their biggest fans shows up to get an autograph from the two after another team-up and it's none other than Marv Wolfman himself.
He is the perfect person to introduce Supergirl and Flash to the idea that the universes are now merged — after all, he's the one who was responsible for the idea of universes merging in the first place.
Wolfman even returned in a capacity as a writer for Part 4 of the Crisis. With all the cameos and tributes that filled the 'Crisis on Infinite Earths', Marv Wolfman's is the most fitting.