Interesting idea about Dr Wells being HG Wells.
However in my post about the latest episode I've had a realization that Dr Wells could very well be Metron
As to Professor Zoom, he gained his powers in the future because he was obsessed with The Flash. However he may well have realized that to preserve his future that certain things must happen to shape the past accordingly and one of them is that Barry must become the Flash.
Ergo, Zoom sets out to set things in motion by killing Barry's mother.
I don't know who Reverse Flash/Zoom is, but I'm pretty sure that it isn't Dr. Wells. Why? Because the photos appearing on newsarama of future Flash episodes show RF/Z in costume and its not the actor who portrays Dr. Wells. Completely different build.