|Bio: Though he was one of the original seven, The Flash felt like he
was always cast aside when it came to big missions; with his
"big dumb mouth" (as he put it) and "immature" attitude, Wally
was never seen as that serious of a hero.
When J'onn denied Mr. Miracle and Big Barda (or "Bertha" as
Flash originally thought) help in rescuing their friend, Oberon,
from the clutches of Granny Goodness, Flash offered his
services. Though denied at first, they eventually saw his
usefulness and were successful in their mission. Extracting
Kalibak from the X-Pit for Granny Goodness in exchange for
Oberon, Flash, Mr. Miracle and Barda boomed back to Earth to
exchange Kalibak for J'onn. Posing as Kalibak, J'onn read
Granny's mind, which enabled Flash to speed off to her hideout
where she had Oberon tied up.
Though he went behind J'onn's back on a mission he said wasn't
worth risking, J'onn had no ill feelings toward Wally; quite the
opposite. Feeling some pang of regret, J'onn "hung out" with
Wally for awhile, playing games.
Flash played a key role in destroying Lex Luthor / Brainiac's attempt to
destroy the world. Tapping into his Speed Force, Flash tore off the Dark
Heart and Brainiac layer on Lex Luthor, freeing Luthor from Brainiac's
control. By doing this, however, Flash began to essentially "die"; he
was transported to a Speed Forest, but before he was stuck there
forever, the Justice League were able to pull him out.
After coming back, Flash remarked that if he ever went that fast again,
he wasn't coming back.
For more information on The Flash, check out his
Justice League Bio.