Tim Blake Nelson's return as Samuel Sterns/The Leader in Captain America: Brave New World is a significant event, given his introduction in 2008's The Incredible Hulk. While initially surprising to see The Leader positioned as a Captain America antagonist, this unexpected pairing is precisely what makes him so compelling. The Leader represents a threat Sam Wilson couldn't anticipate, elevating the stakes.
The Leader, Hulk's arch-nemesis, possesses intellect rivaling the Hulk's strength. His gamma-radiation-enhanced intelligence makes him incredibly dangerous. In The Incredible Hulk, Sterns, initially an ally to Bruce Banner, secretly sought to harness the power of Banner's blood for his own ambitious goals. The film concluded with Sterns' transformation beginning after exposure to Banner's blood.

Marvel's reluctance to produce another solo Hulk film, due to Universal's rights, explains The Leader's absence until now. His inclusion in Captain America 4 is likely a strategic move, capitalizing on the established storyline. While rumors suggested a She-Hulk appearance, The Leader's role in Brave New World appears distinct.
The Leader's motivations remain unclear, but his potential resentment towards General Ross, now President Ross (Harrison Ford), could drive his actions. Seeking revenge, he might target Captain America as a means to undermine Ross and America's global standing. Director Julius Onah emphasizes The Leader's unexpected nature as a key element of his threat.
Onah highlights that this conflict will be a crucial test of Sam Wilson's leadership. He must unite a changed Avengers team against a uniquely intellectual adversary in a post-blip, post-Thanos world. This new era demands different decisions and strategies from Sam, setting the stage for a significant shift in the MCU.
Sam Wilson's experience with powerful villains doesn't prepare him for The Leader's intellectual prowess. Captain America 4 sets the stage not for the next Avengers film, but for the Thunderbolts, suggesting The Leader's actions could irrevocably alter the MCU's landscape.
Will The Hulk Defeat Red Hulk in Captain America: Brave New World?

[Yes!] [No!] [It'll end as a draw!] [It depends (tell us why in the comments!)]