Harrison Wells, since the pilot of The Flash this character has got Flash fans speculating where he is from, when is he from, and more importantly who he is. Now from the last episode "The Fallout" since the "Pilot" we have received a bit of information on Wells through epilogues at the end of almost each episode, which never seem to disappoint. Yet with the information we still are wondering, "Who is Harrison Wells and what is his endgame?" Well let me tell you my theory on who is Harrison Wells.
First of all I believe Wells was an is not Reverse Flash. I believe Wells has some sort of affiliation with Barry in the future. Barry faces a threat that ultimately leads to his failure to get rid of that threat which leads to his death. In order to save the Flash and the world Wells being affiliated with either the Flash or the Justice League (If there is one during that time) gives himself super speed and goes back in time to indirectly train Barry to become a better Flash, and does this by tormenting Barry by wearing the Reverse Flash suit.
Now some may be asking, "Why not just go back in time and tell Barry what to do?". Well here is the problem with that. If Wells did that Barry would have no motivation, no drive to better his skills so Wells (No matter how sick it seems) Wells decides to use the Reverse Flash suit to make Barry reach and exceed his limits. Now there is some evidence to prove this, there is some loose evidence.\
In the “Pilot” everyone remembers the newspaper that tells the fate of Barry owned by none other than Wells indicating he is from the future. In “The Fastest Man Alive” we see Wells kill Stagg once Stagg intends to capture the Flash and see how he works. This is our first indication that Wells is willing to kill to protect Barry giving a sense that he cares about Barry. In “Going Rogue” Wells is clearly mad at Cisco when he reveals that the cold gun has gone into the wrong hands. Next in “The Nuclear Man” we see Wells take a part of the Tachyon Device to save both Ronnie and Dr. Stien. Finally in “The Fallout” we see Wells kidnap General Elling and take him to Grodd who presumably kills Elling.
Although there are some things about Wells or what he has done that may make my theory questionable. First of all he purposely cause the accelerator explosion which endangered and killed many people (Possibly for the greater good). In “Plastique” he cynically tells Bette to kill General Elling, which she fails to do. In “Power Outage” he gets a sample of Farooq’s blood in order to learn how he can absorb the Flash’s powers. In the “Fallout” he is clearly seen working with Grodd and the fact he seems to be Reverse Flash is a big red alert. Although through all this I do believe that Wells is playing the role of the villain rather than actually being one. . In “Plastique” he cynically tells Bette to kill General Elling, which she fails to do. In “Power Outage” he gets a sample of Farooq’s blood in order to learn how he can absorb the Flash’s powers. In the “Fallout” he is clearly seen working with Grodd and the fact he seems to be Reverse Flash is a big red alert. Although through all this I do believe that Wells is playing the role of the villain rather than actually being one.