The Squadron Sinister were brought together by Yandroth to battle the recently retired superhero Kyle Richmond. Richmond was joined in battling the enemies by the "Last Defenders". Hyperion was burnt from the inside by Hellstorm, Doctor Spectrum was defeated by She-Hulk and Whizzer's heels were sliced by Krang.
Weapons: Doctor Spectrum's Power Prism
- The nature of this Squadron Sinister was not fully explored. They were depicted as alien in appearance and were noted as being devoid of any inner-personal identity, to the point where they did not speak. Whether this was due the environment of Earth-89125 or an outside influence is unknown.
- The Doctor Spectrum featured is identified as the second Doctor Spectrum, William Roberts, by Hellstorm.
- 2 Appearances of Squadron Sinister (Earth-89125)
- Minor Appearances of Squadron Sinister (Earth-89125)
- Media Squadron Sinister (Earth-89125) was Mentioned in
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- Team Gallery: Squadron Sinister (Earth-89125)