The Flash is arguably the hottest DC show on TV right now as in many ways it stays true to the comics. However, there is something crucial the writers have yet to touch on, and that is the Speed Force.
For those who are unaware, the Speed Force is what allows The Flash and every other speedster, such as Reverse Flash, to run fast. It is the source of their powers, so it would make sense for the show writers to talk about it if even for a few seconds.
Well, according to Tom Cavanagh, who plays the Reverse Flash on the show, the Speed Force will come into play eventually. It is not certain when fans can get the chance to see the characters talking about the Speed Force, but with the amount of things that happened and is bound to happen, it shouldn't be too long from now.