With his latest movie, The Judge, struggling at the box office, it seems like Robert Downey Jr. may be returning to where he knows the gold can be found and jumping into another Avenger's standalone world. But what implications will this have moving forward?

Chris Evans To Team Up With Spider-Man For 'Captain America 3?'

Variety broke the news on Monday that Downey Jr. would be joining the cast of Captain America 3 as a way to begin the Civil War storyline from the comics.

According to the site, the actor is in final negotiations to play the billionaire in the yet-to-be-titled third installment, that is slated to begin production in the Spring for a May 6, 2016 release. He will also suit up as the superhero in next summer's Avengers: Age of Ultron as part of a previous deal that also calls for him to reprise the role in Avengers 3.

Will Chris Evans Hang Up The Shield During 'Captain America 3?'

The Civil War storyline pits Tony Stark against Captain America's alter-ego Steve Rogers, played by Chris Evans, as they feud over the Superhero Registration Act, which forces anyone with superhuman abilities to reveal their identities to the U.S. government and agree to act as a police force for the authorities.

Stark supports the program, but Rogers does not, saying it threatens civil liberties, causing sides to be taken and Rogers, among others, to go on the run to avoid arrest. The moral question and battle with his Avengers teammate essentially makes Stark a villain of sorts in Captain America 3, providing Downey Jr. with a meaty role he could play out into future Marvel films, including a fourth Avengers.

Downey Jr. teased last week about some stuff moving and shaking at Marvel and this must be the big reveal he was mentioning. This allows the actor to go a different route with his character and have the ability to have some fun with a different version of Tony Stark moving forward.

Captain America 3 is set to open in theaters on May 6, 2016.

Tags: Captain America Movies Robert Downey Jr Chris Evans Avengers 3