VIDEO : The Russo Brothers Discuss The Surprise Return Of A Major Bad Guy

Avengers: Infinity War collects heroes from 18 Marvel super hero movies.
There is also the surprise return of one of the franchise's original villains.
The movie brought back Captain America's nemesis, The Red Skull.
Bringing Red Skull back was easy for the Russo Brothers.
Somebody had to be the gatekeeper to the Soul Stone and somebody had to distribute the rules to Thanos and Gamora.
In a way that was credible and believable.