Tony Stark's death in Avengers: Endgame was arguably the biggest emotional gut punch throughout the entire MCU - and a recent retcon helps to explain one of the more confusing stories involving ...

SEE ALSO: So, who's going to die in 'Avengers: Infinity War'? In many ways, Tony Stark is the OG Avenger of the MCU. The success of the 2008 film effectively set the Marvel machine into motion ...