Resurrected Superman donned the black suit (and a mullet, it was 90's).
"During the week that all the other crossovers are happening, we will essentially be crossing over with ourselves", showrunner Keto Shimizu told TV Line, explaining the special episode will take the Legends across "alternate time periods".
You can see Stephen Amell's Tweet and full photo below.
The CW recently set the dates for the annual Arrowverse crossover, with this year's storyline heading to Gotham City, a place previously off-limits to The CW.
The biker theme would seem to synch up with the bandana that Amell has conspicuously been wearing in recent Instagram stories recorded between filming scenes for the Flash and Supergirl episodes of the crossover.
What is known for certain about "Elseworlds" at this point is that Ruby Rose will debut as Kate Kane/Batwoman during the event. In addition to Hoechlin and Rose, guest stars include Grimm's Elizabeth Tulloch (as Lois Lane), Lost's Jeremy Davies (as Arkham Asylum doc John Deegan) and Cassandra Jean Amell (as Mr. Freeze's wife, Nora).
"Elseworlds" will see all three Arrowverse shows airing on a special night starting with The Flash on Sunday, Dec. 9 at 8/7c, followed by Arrow on Monday, Dec. 10 at 8/7c and closing with Supergirl on Thursday, Dec. 11 at 8/7c.