Did Anything Important Happen Between New 52 and Rebirth?

[GlennSimpson]

Also everybody forgot Garth was ever Aqualad. But everybody remembered that Robin existed and had been Batman's sidekick. And that Speedy worked with Green Arrow, but the "considerably younger sidekick" bit seemed to have faded out. The effects were a pretty random clustermess (if you'll excuse the expression), when you come right down to it.

I kinda like that the effects were not uniform. Gives a better sense that it was a desperate move.