THAT'S what he was getting at? 
That's not half bad but still.
Morrison has for about twenty-five years toyed with the metafictional aspect of the reality in comics as stories and their integrated relationship with the readers and authors. All the way back to
Animal Man. It's all over
The Invisibles to an insane level. It's in
Doom Patrol, it's in
The Filth,
Seven Soldiers is about this. The core idea behind
The Black Glove and
R.I.P. is that all Batman stories are true because they've been written, you can't just write them out of existing.
Flex Mentallo came about entirely because he decided that old ad where the guy kicks sand on the weakling who then works out and beats up the bully is somehow comic canon. His New 52
Action Comics run is a nearly circular story which ties into both
All-Star Superman and
DC One Million BECAUSE EVERYTHING IS CANON even after we've rebooted the multiverse.
The Multiversity is this to the ultimate extent, especially the reveal about The Gentry. Well, maybe
The Invisibles is, except that a lot of it is borderline gibberish especially after Morrison writes himself into King Mob completely.
The funny thing about Batman and Robin/Batman Incorporated is that it's the most straight forward thing he's written and it's still insane compared to literally anything Geoff Johns does.
Morrison has basically been writing one big maxi-arc his entire career even if unintentionally, but the only time he's ever been edited by someone to rein him in is on JLA and Batman. Arguably,
Planetary by Warren Ellis is the same exact concept except shorter. (EDIT: Also, the Literals role in
Fables.)
Never read Blackest Night/Brightest Day but always really wanted to considering how many people get brought back from the dead, haha.
Almost all of the Green Lantern stuff after Sinestro Corps War is a good idea poorly executed and Blackest Night is definitely that to where it's really uninteresting or compelling in anyway outside of the concept. Brightest Day is kinda fun because it's such an anti-event, but it's the JLI reunion/OMAC sequel series that ran alongside it that has all the exciting stuff.
Speaking of the New 52, Brightest Day and Animal Man, the
Rotworld crossover was pretty crazy awesome in ways I didn't expect. I also really liked
Futures End. Both did the whole "dump you into a disaster timeline and slowly but never fully explain what happened because there's shit to do" that
Flashpoint did. Rotworld was by Snyder and Jeff Lemire (who does Teen Titans Earth One among other things) in Swamp Thing/Animal Man/Frankenstein.
Futures End's tie-in to
Earth 2 which was the Old 52's
JSA rebooted probably helped it quite a bit much like it did
World's End.
