Every superhero cameo in The Flash explained, from the obvious to the obscure

polygon.com:

Anybody who’s seen an ad for The Flash knows he’s not the only superhero in it — there are multiple Batmans! And Supergirl! But you can’t have a multiverse without alternate versions of superheroes, and Warner Bros.’ latest DC Comics film is filled with cameo appearances.

Some are very familiar, but others are very obscure indeed. So here’s every superhero who appears in The Flash other than Barry Allen, and what they’re a reference to. And, just for fun, I, Polygon’s comics expert, will assign them the universe of the DC Comics multiverse in which they’d feel the most at home.

[Ed. note: This piece contains universe-sized spoilers for The Flash.]

Played by: Ben AffleckFirst appearance: Batman v Superman: Dawn of Justice

This is an easy one, it was in the trailers! Ben Affleck returns as Batman for likely the final time (pending an Aquaman 2 cameo), offering a fatherly shoulder to a lonely and conflicted Barry Allen.

What Earth should he live on: The universe of Frank Miller’s The Dark Knight Returns, obviously. It’s the existing DC Earth that most clearly inspired director Zack Snyder in creating his costume and vibe.

Played by: What appears to be a CGI double made to look like Henry CavillFirst appearance: Man of Steel

There’s no actual Henry Cavill appearance in The Flash, as there was in last year’s Black Adam. We get a look at the back of Superman’s head in some news footage — but hey! It’s an acknowledgement of his existence.

What Earth should he live on: Prime Earth, the earth that DC rebooted itself into in 2011. That Superman had a short, spectacular life of adventures, starting his superhero career in cuffed jeans and a Superman t-shirt before going out in a blaze of glory and being replaced with a more