The first trailer for She-Hulk: Attorney at Law shows Abomination in his human form. Despite his latest appearance in the MCU's first She-Hulk trailer, Abomination was first introduced all the way back in The Incredible Hulk. In that movie, special forces operative Emil Blonsky, played by Tim Roth, was injected with a new version of Super Soldier Serum and later Bruce Banner's blood. The injections transformed Emil into the uncontrollable Abomination, and he has not made any other human appearances in the MCU until She-Hulk.
In the comics, Emil was unable to transform back into his human form after becoming the Abomination. This lines up with Abomination's past two appearances. He appeared in the third act of The Incredible Hulk and a redesigned Abomination was also in Shang-Chi, remaining inhis monstrous form. Yet, Tim Roth is back in Emil's human form in the She-Hulk trailer, which raises a lot of questions about the character as well as the timeline of the Disney+ series.
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Roth's return to the human form of Emil Blonsky in the She-Hulk trailer could mean that Emil Blonsky gains the ability to transform between human and creature just like Bruce Banner and Jennifer Walters. It's currently unclear when exactly the series takes place on the MCU timeline, but several details suggest it occurs before Avengers: Endgame — Emil is still in custody, as he was at the end of The Incredible Hulk; Bruce's arm does not yet have the injury he received in Endgame, and he's still Smart Hulk; in Shang-Chi's post-credits scene, he was revealed back in Bruce Banner form. If that's indeed the case, then Emil has not lost the ability to become Abomination. It's possible
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