In the “Avengers: Mech Strike” series (by Jed MacKay, Carlos Magno, Guru-eFX, and VC’s Cory Petit), Kang the Conqueror’s attack on Earth with alien-like machines from the future leads Iron Man to give himself and his fellow heroes mech suits capable of taking on the mechanical threats, which are known as Biomechanoids. The five-part miniseries features some good old-fashioned mech action, with the Avengers outfitted with mechs built with vibranium and other upgrades suited to their specific skills and powers.
The main Avengers squad consists of Iron Man, Thor, Black Widow, Spider-Man, Captain Marvel, Hulk, and Black Panther, and sees the group take on the nefarious Kang as he tries to gain control of Earth and have time collapse on itself. The book has some shocking moments, including the death (and stunning revival) of a major hero, while Thanos later joins the team to stop his fellow villain’s attack. The Mad Titan is equipped with his own mech and serves as a surprise ally, seeing Kang as a threat to his future plans. Ultimately, “Avengers: Mech Strike” is a total blast and doesn’t hold back when it comes to pulse-pounding mech battles with a superhero twist.
It remains to be seen whether the “What If…?” episode is directly based on or if it’s even inspired by the comic book miniseries. But seeing Captain America and Sam Wilson suit up in their mechs is a promising sign that some version of the storyline may be getting adapted on the small screen.