From www.comicbookresources.com:

JAY GARRICK'S HELMET SPOTTED IN "LEGENDS OF TOMORROW" SET PHOTO
Posted: 9 minutes ago

TVBrett White, Assistant Editor0
      
Now that we know that the CW's upcoming DC Comics series "Legends of Tomorrow" will be dealing with time-travel, the odds of seeing some Golden Age heroes on television just increased exponentially. A new photo possibly taken on the "Legends" set has surfaced on Imgur that teases one Golden Age character in particular -- the original Flash Jay Garrick. The image depicts Reverse-Flash (Tom Cavanagh) seated in a Time Sphere with the hero's iconic helmet tossed just outside of it.


Footage of Wells in the Time-Sphere-like device was included in the recently-revealed "Legends" trailer, a fact that right now ties this image to the upcoming spinoff series rather than "The Flash" proper.

That being said, it's also possible that Garrick could race onto the "Flash" at some point in the near future. "Flash" actress Danielle Panabaker also brought up Jay Garrick's name during a recent AMA session on Reddit, teasing that she's "excited about the potential of Jay Garrick."

"Legends of Tomorrow" debuts on the CW in 2016