I've been following the new Flash ever since post Infinite Crisis and I've got to say... while he is still a newbie to the Flash game compared to the old Wally West, having the Speed Force contained within him has definitely put Bart in a class of his own now. Here he exceeds
the speed of light as if it were nothing while for Wally it was always a big deal just reaching light speed. Whenever Wally broke the light speed Barrier there was always the risk that he would get trapped forever in the Speed Force. Obviously Bart doesn't have that problem now.
So, can the JLA actually get along without some kind of specialist Speedster, instead relying on Supes and Wonder Woman's natural speed ?
Or is Bart going to finally join ?
I recently left the current Flash series after the first story arc. Bart doesn't really grow on me as the Flash like Wally and Barry did.
As for him joining the JLA ...... Personally, I believe he should be a member of the team. I think he's got enough experieince to play in the big leagues and Roy can take him under his wing to fill in the details. I really can't see him rejoining the Teen Titans. A guest appearance ...... yes, but not as a member. Even if Superboy/Connor is resurrected, Bart should not come back. He's moved on.