The Sentry’s powers come with a dark opposite named the Void, a bonded entity on the same power level as the hero but with sinister aspirations. With Sentry’s god-like abilities, the Void can destroy the planet. The damage the Void is capable of outweighs the good Sentry can do. As such, Marvel Comics heroes, including Doctor Strange and Reed Richards, have made the difficult decision multiple times to make the world forget about Sentry — wiping Bob Reynolds’ heroic form’s memory as well — to suppress the Void from ever breaking free, as it would spell the end of the Marvel Universe. He’s that dangerous.
The Sentry’s greatest weakness is the Void. No matter how much good he can do being a hero with his amazing powers, his dark side is always waiting to break free and undo everything Sentry has done to make the world safer. The Void means he can’t exist in his most heroic form without the constant threat of a great, universe-destroying evil appearing at any time. It makes Sentry one of the more complex heroes as he constantly battles his literal inner demon from emerging. It will be fascinating to see what aspects of Sentry and the Void are adapted in Steven Yeun’s portrayal of the character in “Thunderbolts,” as the titular team in the Marvel Cinematic Universe will be in trouble if his evil persona manages to break free.
Steven Yeun’s Sentry officially takes flight when “Thunderbolts” arrives in theaters on July 25, 2025.
