http://www.ign.com/articles/2015/05/...he-future-mean
THE FLASH: WHAT THOSE GLIMPSES OF THE FUTURE MEAN
The Season 1 finale of The Flash was packed with a lot of awesome moments, but the big talking point has been the Speed Force sequence where Barry Allen sees several images from his past, present, and future. Let's dig into what we saw.
In the comics, Caitlin Snow is the real name of villain Killer Frost -- a woman with blue skin and deadly ice powers. In the show, Caitlin is a scientist working to help the Flash during Season 1, so it's interesting that in the comics Killer Frost is a straight up villain, meaning something pretty messed up would have to happen to Caitlin in order for her to turn from the path of good.
We are assuming this is a vision from the future where she has received her powers and a new look, including a blue leather costume, blue lips, blond hair, and White Walker eyes. The big question now becomes, how did she get her powers? Were they from the Particle Accelerator explosion that caused so many others to develop abilities? Or will she get them another way?
Then again, maybe this is not a glimpse of the future and instead we are seeing a Caitlin from another dimension where she got powers instead of her fiance Ronnie Raymond aka Firestorm? Only time will tell.