One thing everyone knows about Marvel is that it guards its secrets with more ferocity than a dragon guarding its hoard. Cast, crew, producers—really anyone involved in the production is expected to keep their mouth shut or face the consequences, as this MCU villain almost discovered.
Frank Grillo is known for playing the villain Brock Rumlow, a.k.a. Crossbones, in Captain America: The Winter Soldier, a role he reprised in Captain America: Civil War and then again in Avengers: Endgame. The actor has now stepped over the fence to join James Gunn at DC and will voice the character Rick Flag Sr. in the animated series Creature Commandos. The character is also set to star in the flesh in the Superman reboot, Superman: Legacy as well as season two of Peacemaker with Grillo remaining in the role.