In DC comics, Ramsey Rosso/Bloodwork was an enemy of the Flash who had the power to control blood. His first appearance in the comics was The Flash #29 (October, 2017).
In the comics, Chester P. Runk is known as Chunk, a former super-villain and now ally of Wally West.
Ralph says that he got his tuxedo from Opal City, which is the home of Starman in the comics.
Kamilla questions "why there's always a crisis" whenever she's around, a reference to yearly crisis events.
Ryan Handley (Godspeed) was a stuntman on Suicide Squad (2016) and Deadpool (2016), the former a DC film and the latter a Marvel film. He also played Superman in Shazam! (2019).