Secret closet...Lol With a secret closet in the secret closet.
I don't think Wells is RF, he was to concerned with keeping the future the same when Barry lost his powers a couple weeks back. Plus didn't Professor Zoom/ RF need the costume to replicate The Flash's powers? Wells made his voice vibrate without the suit. Impulse/Bart Allen perhaps?
My theory. RF is future Eddie, when he went back to kill Barry's parents, Wells or Impulse went back to stop him. In the fight RF suit gets damaged and can't time travel back to the future. Wells/Impulse decided to train Barry while also trying catch RF.
Also going to guess Caitlin (?) turns into Killer*Frost soon, trying to help Firestorm pretty soon.
Lots of possibilities still in play. It was interesting Dr.Wells had a Flash ring. That would suggest some connection to the Flash. The fact that they've made the West family black seems to eliminate Wally, unless he's adopted family. Jay Garrick never had a Flash ring, as I recall. That tends to lean more toward a future Barry, or, as you suggested Bart. But let's not forget there have also been two ReverseFlashes, so maybe Wells is one of the two, having somehow procured a Flash ring.
I don't know. Like I said, there're still several possibilities.
If Caitlin makes the transition to Killer Frost, what about Cisco? Do you think he ever becomes Vibe? I read up on the character recently and it seems his power allows him to interfere with the speed force. So far, we haven't seen the actual term introduced into the show, but it seems likely it will be eventually. The interesting thing is that the current origin of Vibe has him deriving his power from being caught in the event horizon of a boom tube. If you went with that origin, it could lend more to the idea of HW being Metron, or at least to the idea that Metron is somehow involved with the show. But then why would he have a RF suit? Like I said, so many possibilities are there, it's just a matter of what they choose to go with.
I like the show, but it's a real head-scratcher atm. Personally, I'm still trying to use my inner comic geekdom to put pieces together, but I've yet to find a big picture that puts all the pieces together. FTR, I think that's a good thing. Not knowing keeps you coming back for more.