DC's two television universes are ready to collide.

'Supergirl' CBS: Superman Is On His Way! But There's A Twist

Superman does not yet exist in The Flash/Arrow/Legends of Tomorrow world, but it appears Supergirl will soon bring the Kryptonian legacy into The CW's interconnected world of superheroes.

The Bleeding Cool news comes with a caveat. The crossover is allegedly slated for May sweeps, which means it will only materialize if Supergirl receives an order for a back nine.

'The Flash' Season 2: Wally West's Debut Announced, When Will Joe Meet His Son?

For fans, this Thanksgiving announcement is a bit of a shock. Supergirl/Flash/Arrow/Legends of Tomorrow executive producer Gregg Berlanti recently informed TV Line that a merging of the two universes would take quite a bit of leg work.

"Flash and Arrow [fans] know we have not mentioned the existence of Superman on those shows, and he does exist on [Supergirl]," Berlanti told TV Line. "Storytelling-wise, that would be something we'd have to overcome. We're just focused on getting this one launched and hope that it enjoys some of the same success... with the same quality and commitment of fans. And if all those things happen, who knows?"

How will Barry Allen (Grant Gustin) and Team Flash figure into Kara's (Melissa Benoist) world? Viewers will just have to wait and see.

Catch Supergirl Mondays at 8 p.m. ET on CBS and The Flash Tuesdays at 8 p.m. ET on The CW.

Tags: The Flash television the cw Supergirl