Maybe he will come back...I hope that is the case, but for the time being, I don't see that happening. Chris Burnham talked about hoping this was permanent as to not "cheapen" the death. I'm well aware that other characters have returned from "the dead"....especially Robins, but this is a different case though since the writer that created the character for a specific run is killing him off while he's concluding that run. Perhaps we will see him again in a few years, but I doubt it.
Also I never said RIP never happened. All I mentioned was that it took place at the same time as Final Crisis and that Bruce was trapped in the dream machine. That was also part of the plan as I mentioned in my previous post.