Suicide Squad: 30 Easter Eggs & References You Must See
27. Cicada
You might miss it, but the restaurant that Waller takes her guests to to discuss the possibility of Task Force X becoming a thing is named after a DC comics villainous cult.
It's called Cicada, named for the Flash cult set up by David Hersch who becomes immortal and crucially gains the ability to absorb life force from other people (just as Incubus does to gain strength when he first manirsts in the movie).
It's a pretty obscure reference, but it can't be a coincidence.