Prime Video’s Fallout Season 2 finally confirmed Macaulay Culkin’s long-rumored role, revealing him as a senior officer inside Caesar’s Legion in Episode 3. But new fan theories suggest the character could reshape the balance of power in the Wasteland.
Culkin’s casting had circulated online since late 2024, though Prime Video kept quiet. When the studio released a trailer in November 2025, fans spotted the actor dressed in full Roman armor, fueling speculation about his importance to the story. Those suspicions were confirmed when the latest episode aired, showing the Legion splintered into two rival factions following the death of their leader.
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The late Caesar left behind a will naming a successor, but with the document missing, the rival groups now battle over his corpse in a no man’s land. Culkin’s character, introduced as the “Lacerta Legate,” commands a high rank but remains shrouded in mystery. In the series, Lucy (Ella Purnell) and the Ghoul (Walton Goggins) encounter the fractured Legion, raising questions about how these tensions will play out.
Some fans believe the Lacerta Legate will unite the warring factions and crown himself the new Caesar. Online theorists point to Culkin’s original character description as a “crazy genius” as evidence he may be manipulating the civil war for personal gain. “He’s going to take control of the Legion and rebuild an empire,” one Reddit post claimed, arguing he could target the New California Republic and seize Hoover Dam to restore the Legion’s power.
A blurry promotional image circulating on social media appears to show Culkin wearing Caesar’s golden crown. The shot has sparked debate over whether his character is part of the planned succession line mentioned in Fallout: New Vegas, where the companion Boone tells players the Legion has a system for replacing its leader.
Fans say the speculation fits the show’s larger vision. A powerful new Caesar could reinforce the game’s mythology while creating fresh stakes for television. The New California Republic is already struggling after the nuking of Shady Sands last season, leaving the Wasteland more vulnerable than ever.
Game director Todd Howard previously promised Fallout would not retcon events from New Vegas. For now, viewers can only wait to see whether Culkin’s mysterious Legate becomes the next Caesar or something far more dangerous, especially after episode 3’s explosive ending.
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