Mystery Inc reaveled to the Hall of Justice in order to consult the Justice League on Superman's disappearance. There, they reunited with Wonder Woman , Batman , and Robin , while meeting Aquaman . They revealed that, a week prior, a ghost had made Superman vanish. In order to make it seem that nothing was wrond, Mystery Inc disguised themselves as Junior Super Friends: Velma as Wendy Harris , Shaggy as Marvin White , Scooby Doo as Wonder Dog , and Fred and Daphne as the Wonder Twins . Wondering how to explain Superman's disappearance, the League solves the problem by introduceing them to Supergirl .
Just then the ghosts appeared, and Aquaman made the Purple Ghost disappear with water, revealing it to be a hologram. After that, a Green Ghost attacked the League, making them disappear. Supergirl was then attacked by a Yellow Ghost, imprisoning her. The ghosts surrounded Mystery Inc, and unmasked them, as the Orange Ghost recognized them. Fred then unmasked him in turn, revealing the Scarecrow . The remainder of the ghosts unmasked themselves, revealing Sinestro , Gorilla Grodd , Lex Luthor , Brainiac , Solomon Grundy , and Cheetah : The Legion of Doom . The gang then ran away, with Shaggy and Scooby running into Bizarro and receiving his help to fight the Legion of Doom. Meanwile, Fred realized that Brainiac only shrunk the Justice League, and they just need to find and free them.
The League knocks over the jar they were trapped in, revealing small versions of themselves. Superman and Wonder Woman beat Grundy, Batman and Robin tripped Scarecrow, and Aquaman led Grodd into a trap where he was captured by a giant octopus in a pool. Shaggy and Scooby then seized control of Sinestro's Yellow Power Ring , and used it to restore the heroes to their full size. The heroes quickly beat the villains, and Shaggy surrendered the Ring.
- Super Friends (single appearance)
- Supergirl (single appearance)
- Rainbow Ghosts (single appearance)(miscellaneous speaking)(Legion of Doom's disguises)
- Legion of Doom (single appearance)
- Junior Super Friends (only time mentioned)
- Wonder Twins (only time mentioned)
- Koko (single appearance)(no lines)(flashback only)(unnamed)
- Topo (first appearance)(no lines)
- Super Friends Trading Cards
- Kryptonite (mentioned)
- Bottled city (flashback only)
- Magic lasso
- Power ring
- Shrinking ray
- Lex Luthor's laser gun (destroyed)
- Yellow trading card of Mystery Inc. and Super Friends
|Legion of Doom as the Rainbow Ghosts||To trap the Super Friends.|
- Daphne and Velma became honorary Amazon sisters in the previous story, Trouble in Paradise.
- While in disguise, Scarecrow recognises the gang from his last encounter with them in Who's Scared?
The following credits try to match how they are displayed in the comic as much as possible:
- Story by: Sholly Fisch
- Art by: Dario Brizuela
- Colors by: Franco Riesco
- Letters by: Saida Temofonte
- Cover by: Dario Brizuela with Franco Riesco
- Assistant editing by: Jessica Chen
- Editing by: Kristy Quinn
- Superman created by Jerry Siegel and Joe Shuster. Supergirl based on the characters created by Jerry Siegel and Joe Shuster. By special arrangements with the Jerry Siegel family. Special thanks to Leandro Corral.
- None known.
Inconsistencies/continuity errors and/or goofs/oddities
- The direct-to-video film Scooby-Doo! Mask of the Blue Falcon, had seemingly made the likes of Wonder Woman and the Wonder Twins fictional.
- Apparently the public know about the Junior Super Friends, but not enough to know that they've graduated.
- All of Marvin's training led to him becoming a dentist?
- It's unclear why Scooby and Shaggy are given Yellow Lantern suits, while Sinestro wasn't.
- When the case was over, Superman remarked that he should get the gang to help him catch his rogue's gallery, completely ignoring that three of the Legion of Doom were from his personal rogue's gallery, including Lex Luthor.
- It's the personal visit and help he was probably referring to, though.