Bruce Wayne being replaced as Batman has been a major plot point in the last 20 years,from Jean Paul,to Dick Grayson,to Gordon right now,now between jean paul and grayson first replacement and his second time as the successor it took 15 years for it to happen and after that it took 4 years for it to happen again with gordon,now it's safe to assume Bruce will be back at the end of super heavy so in your mind how many years should Bruce remain as bat's before being replaced as batman again or if being replaced at all?