In the latest trailer for The Flash Episode 22 Rogue Air, Harrison Wells appears to show he does in fact possess more stolen technology from The Flash than we thought. It was already revealed that Gideon, the A.I companion he has kept since the beginning of the show, was created by the future Barry Allen. This was revealed by Barry asking Gideon to keep it a secret that they were there, to which Gideon replied it would take any command from him because he is Gideon's creator!
Now fast forward to the main point of this article. In the trailer Wells is about to begin a confrontation with Firestorm, Al-Sahim Oliver Queen, and The Flash, right before attack in a blink-and-you'll-miss-it moment where the Reverse Flash costume seems to pop out of nowhere.
Its all in the wrist! Or the hand anyways, *insert bad pun joke*, its the Ring! Now is it possible that after the final showdown with the Reverse Flash that Barry wins, takes his tech and realizes its capabilities and recreates it for himself? In other words, could this be the reason he created it in the first place!? Thus another factor in the timeline that finding it in fact gave the idea to create it in the first place.
The way this is all panning out it is quite possible that may or may not be the case. Such as Cisco putting it when he noticed the Flash's white logo and commented on how seeing that could be the inspiration to create it in the future!
I guess we will have to wait and see how it turns out! What do you think?