Junzo Muto (Earth-616)

Junzo Muto stands out as a formidable assassin and former leader of the Hand, a ninja clan already established in the MCU through Daredevil and The Defenders. Muto's backstory involves rising through the ranks of the Hand by absorbing the powers of others, including a brief stint as the wielder of the Iron Fist after stealing Danny Rand's chi.

His narrative arc often portrays him as a power-hungry manipulator who clashes with heroes in epic martial tournaments and clan wars.

Muto's abilities include exceptional hand-to-hand combat prowess, enhanced by his capacity to absorb chi and magical energies, which he can channel into energy-surrounded fists for devastating strikes.

This makes him one of the deadliest martial artists in the Marvel Universe, capable of adapting mid-battle by siphoning opponents' strengths.

In the MCU, he could revive the Hand as a recurring threat in an Iron Fist reboot or crossover with Shang-Chi. His inclusion would offer a villain whose tactical brilliance pushes even the best heroes to their limit.