the title for the Spin-Off they haven't announced yet but seems to be call Legends of Tomorrow! and of course Caitlin will have screen-time but might just be her with Ronnie/ being Dr. Snow while Barry/Cisco/Joe/Eddie hopefully Iris go out and do the fun stuff it's like a family go out and do the fun/cool stuff while one member has to stay at home and watch at the sidelines. Barry ok guys lets go out take care of this villain Caitlin you stay here keep a eye on Star Labs until we get back ok great also with everything that is coming in S2 someone will have to lose screen-time not do so much and Caitlin is the most likely one to lose screen-time. She stays at Star Labs, doctor everyone up, watches on the sidelines while everyone else is out battling. In others words she will take Dr. Wells place at Star Labs watching things from the computer giving them advice while there battling without the whole RF thing and Ronnie may take RF place in the cast list. Something tells me when Tom is dropped from the cast and they don't show him much the ratings will drop if they trade Tom for Robbie oh bad move one of the first things a lot of fans said when it was reveal that Wells wasn't the RF we hope we don't lose Tom they better not kill him off we can't see no else play RF except Tom etc etc. And with Grodd coming in S2 with also RF the only person who knows him inside and out the writers may be planning a RF return teaming up with Flash to face Grodd that team up would be awesome.

Reverse Flash cripples Caitlin instead of killing Ronnie putting her into the chair RF used that would be one way to cut her screen-time by having her crippled in a wheelchair staying at Star Labs she would be the next Wells then.

In episode 19 suitably named "Who Is Harrison Wells?" Joe and Cisco head over to Starling City in order to continue their investigation of Dr. Harrison Wells, reports TVGuide. Cisco will meet the Black Canary aka Laurel Lance and she asks him a favor. Design & Trend reports that the favor will be developing a new version of the Canary Cry, which will be similar to the comic books. Additionally, back in Central City, Barry will race against time to catch a meta-human who can transform himself into any person he touches. The meta-human's name is Hannibal Bates and the character transforms himself into Eddie, Iris, Caitlin and finally the Flash during the episode.

Who knows who will be the metahuman in the SnowBarry kiss as shapeshifter transforms into both Barry and Caitlin! :O

Ronnie triggers her Frost powers, that would do it. They would be like Gambit and Rogue were in the comics for I think over a decade. He wouldn't be lost to her by death, but if she's afraid she'll kill him every time she touches him (lose control of her powers somehow)...she would have him and not have him at the same time. Not sure what they will be doing with KF, but that would be pretty devastating and fit the bill.

What if they're doing it like Shado & Slade in Arrow season 2? There are lot of shado scene but only as part of Oliver and Slade memories? From those memories, we know the reason why Slade hate Oliver so much.

Killer Frost eventually discovering Firestorm's blasts can temporarily heal her condition. When he was declared dead by the Crime Syndicate, she loses hope for a cure. Killer Frost mourns the disappearance of Firestorm (who was the only person who could provide her with the unlimited heat she needs for sustenance).

She is distracted though by a woman's cries for help as her son is trapped in a flaming car. Though she is tempted to steal the woman's heat, the talk of fire intrigues Killer Frost. Investigating, she discovers that a supervillain calling herself Hotness is causing fires everywhere. Gleefully, Killer Frost catches her and steals her heat, killing Hotness. Despite having done nothing else to help, the boy is reunited with his mother, and Killer Frost resumes her search for Firestorm