My prediction about the crossover

Sara Lance: So…what’s with you and the cop back there? These looks you give each other could give Firestorm a run for his money

Alex Danvers: …No it’s not like that. We are just friends

Sara Lance: Really?

Alex Danvers: I wanted something more but…she doesn’t like me this way

Sara Lance: Are you sure? Cause I have a LOT of experience in these things and those looks she is giving you…they are not friend looks

Alex Danvers: She was pretty clear on the subject

Sara Lance: Wanna test it?

Alex Danvers: Wh….

*is pulled into a world ending kiss by Sara*

*in the background Maggie crushes her smartphone in her hand and looks at Sara with murderous intent*

Sara Lance: Yeah she likes you

Alex Danvers: What…where…huh?

Sara Lance: Glad I could be of service. Now if you would excuse I have to go and test how straight Supergirl is

‘The Flash,’ ‘Supergirl’ staging musical crossover

supergirl-source:

“Yes, there will be a musical crossover,” executive producer Greg Berlanti told reporters at the Television Critics Association’s press tour on Thursday. “There’s going to be a musical pair of episodes in the back half of the year between Supergirl and Flash.”
Of the music they’ll use, Berlanti noted, “I think they’re going to be mostly preexisting songs.” Practically the entire cast of The Flash has musical talents, including Grant Gustin and Jesse L. Martin, as well as the Supergirl cast, including Melissa Benoist and Jeremy Jordan.

‘The Flash,’ ‘Supergirl’ staging musical crossover