you won't believe what Robert Downey Jr does in Avengers doomsday just when you thought you knew the Marvel Universe Inside Out Robert Downey Jr takes a mind-blowing turn that'll leave you speechless he's not just Tony Stark this time he's on a mission so unexpected it redefines everything ready for it in a jaw-dropping Twist Robert Downey Jr steps turns into a the MF Doom rest in peace but seriously he turns into Dr Doom arguably the most powerful villain that we have seen yet Tony Stark is an enemy how does he pull this off this isn't the hero you know and love hopefully we can see Robert Downey Jr crush this role as he always does what's your reaction to this insane plot twist let me know in the comments and hit that follow for more epic reveals thanks for watching