The Flash #21 introduced the "Hall of Lost and Found," a vault filled with items collected during the Justice League's various adventures.
As the name suggests, the Hall of Lost and Found is a veritable treasure trove of DC Universe artifacts and contains a ton of Easter eggs and references to past DC stories...all of which could possibly now be in continuity due to the recent tinkering with the DC Universe's timeline.
So what the heck are all these items? Well, the crack team of ComicBook.com have come up with an (almost) comprehensive list of every DC Comics weapon, costume, item, and vehicle found in the Justice League's vault. So look below and be sure to let us know if you spot any item we've either missed or misidentified!
Additional reporting by Russ Burlingame & Troy Brownfield.
Page 11; Panel 3
2. Possibly the Universe Orb, used by Harbinger to record the history of the DC Universe.
3. Martian Manhunter's original costume.
4. A Cosmic Egg, as seen in the JLA/Avengers crossover.
5. Phantom Zone projector
6. The Scepter of State, a Martian artifact designating the leader of the Green Martian community
8. Blue Beetle's Bug
9. Possibly a Kryptonian rocket
10. Possibly a pope or bishop's vestments
11. Voyager II
12. Clearly some kind of New Gods-style armor, although the exact character to whom it belonged isn't clear.
13. Sargon the Sorceror's Costume. Sargon was an original JLA honorary member and participant in the E1/E2 crossover that explained the Black Canaries (like issue 220/221 or so of original run).
14. Azrael's Costume. We’re assuming the sword is connected to the costume it’s next to. Otherwise there are a bunch of glowing or fiery swords it could be, including Son of Vulcan, Nightmaster, or Zauriel.
15. The Key's Keyblaster
16. Hourman's Timeship, used by the android Hourman to traverse time.
17. The Helmet of Nabu, worn by Dr. Fate
18. The Mega Rod, the weapon wielded by Big Barda
20. Skeets -- or at least one of his shells. This might be his first on-panel appearance in continuity since Flashpoint, although he has been depicted as alive in Justice League International (and seen in the Booster Gold/The Flintstones Annual).
21. Doctor Destiny's costume, with the Dream Ruby attached
22. Starman's gravity rod
23. Lobo's chain-hook
24. The H-Dial
25. Eternity Book
26. Possibly Wonder Woman's shield
27. Blue Devil's Trident (Trident of Lucifer)
29. An atom bomb
30. The Mars Rover
31. Worlogog, a map of the universe in four dimensions. Can be used to manipulate reality.
32. Matter Master's wand.prevnext
Page 12; Panel 3
1. JSA Costumes; specifically the Star-Spangled Kid, Hourman, and an unknown character...maybe the Spectre?
2. A Kirby Dot - as labelled on the canister.
Page 14; Panel 1
1. Several Starro spores
2. A Green Lantern ring
3. The head of Armex from the Hyper-Clan. The Hyper-Clan were a group of White Martians who posed as superheroes in Grant Morrison's JLA run, which was illustrated by Howard Porter, the illustrator of this issue.
5. Prometheus's costume
6. Zum's costume from the Hyper-Clan.
7. Protex's costume from the Hyper-Clan
8. Primaid's costume from the Hyper-Clanprevnext