The X-Men's Jean Grey was the first She-Hulk - after a fashion. Everybody knows She-Hulk, the Jade Giantess. Jennifer Walters is Bruce's cousin, and she was granted super-powers when she received a transfusion of Bruce Banner's blood. It won't be long before She-Hulk comes to the MCU, with Marvel planning a She-Hulk Disney+ series expected sometime in the next year.

Stan Lee created She-Hulk back in 1980, and she was actually introduced for business reasons rather than creative ones. CBS' The Incredible Hulk TV series had proved a tremendous success, and Marvel feared television execs would create a She-Hulk first. Marvel published their own She-Hulk first, a smart way of ensuring they were the ones who owned the rights to the character. Ironically, Jennifer Walters has proved something of a hit.

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In 2014, writer Alan Davis wrote a new Savage Hulk miniseries that subtly changed She-Hulk's history - after a fashion. It saw an early X-Men team - Cyclops, Iceman, Marvel Girl, Havok, Beast, Polaris, and Angel - attempt to help Bruce Banner cure himself of the Hulk. Banner had developed advanced technology to manipulate his own mind, but it had failed, and so he had given it to Xavier so the Professor could use it to repel an alien invasion. Xavier believed the telepathic component was the only reason it failed, and he attempted to help. Unfortunately, something went badly wrong - and Jean Grey absorbed the Gamma mutation, becoming the first She-Hulk.

Jean Grey Becomes She-Hulk

Gamma radiation has a different effect on every person. For Jean Grey, it unlocked the Omega level potential of her telekinesis, allowing her to manipulate matter on an atomic level. Unfortunately it also warped Jean's mind, encouraging her to becoming increasingly unstable. Xavier realized she was telepathically manipulating the X-Men to support her, but when he confronted Jean, she threatened to unleash her powers against him. In a fascinating twist, it turned out this was all an illusion, a false reality created by the Hulk himself; Xavier's attempt to heal the Hulk had gone wrong, and he had become trapped inside the Hulk's mind. This nightmare reality actually represented Xavier's own fears; his knowledge of Jean's potential, coupled with his fear she could go out of control. At the time, Xavier was secretly using his own powers to inhibit Jean's, preventing her reaching her full potential. Appropriately enough, everything Xavier experiences in this vision reinforces his fears - and would be fulfilled when Jean bonded with the Phoenix Force.

Jean certainly made an impressive She-Hulk, and she would have wielded the combined power of the Hulk and an Omega level mutant. In the end, though, the false reality was dispelled and Xavier realized he had been unsuccessful. The potential cure briefly backfired, granting the Hulk the telekinetic potential of Jean Grey and allowing him to level an entire mountain; the X-Men barely escaped with their lives, and they never tried to cure the Hulk again.

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