A Lonely Place For Dying introduced the current Robin.
Death in the Family killed Jason Todd.
Man of Steel made it so Superman was the only Kryptonian, as well as brought back the Kents.
I haven't followed the character for awhile, but Black Canary, far as I know, shouldn't have her sonic scream anymore since she was tortured and had her vocal cords slashed.
While Superman died and came back repercutions from that event are already active today, mainly Superboy and Steel.
Zero Hour rebooted the Legion and that continuity's still active.
Aquaman lost his hand almost a decade ago and it's still lost.
Ocean Master (or was it Black Manta?) killed Arthur Junior.
Hector Hall's the current Fate and looks to still be the only one for years to come.
There's a new Mr. Terrific, a new Dr. Mid-Nite and a new Hourman because the originals died almost a decade ago.
Odds are they'll stay dead.
From a current Previews, Kon-El/Superboy is joining the Legion. This is a long term change that will still matter a year from now.
From a current Previews, Impulse has become the new Kid Flash.
This change will last till he becomes Flash.
How's that?
Comics are like a Rorschach test; everyone has a different opinion on what they are and can be...