The massive success of Guardians of the Galaxy did many things for Marvel, including injecting some much needed fun and whimsy into the often grim superhero genre. The film's record breaking box office performance proved that the studio's gamble on a"risky" film paid off tenfold. It also introduced numerous beloved characters to audiences worldwide, including the (mostly) gentle giant Groot.
This character was portrayed in voiceover and motion capture by Vin Diesel, in a role that finally ushered the actor into the Marvel Universe. Prior to Guardians Diesel was rumored to be in talks for numerous different Marvel roles, and it sounds like those conversations may still be continuing.
In an interview with io9 Diesel not only confirmed that he is interesting in playing other characters in the MCU beyond Groot, he also stated that his resume would serve to enhance his chances of taking on another role, not impede them.
“I can totally be something [else] with Marvel, I think playing that role only makes Marvel that much more excited and me having my experience with Marvel, seeing how great they were, makes me more excited.”
Diesel elaborated on those talks, which allegedly have him playing a live-action, but a character that will either not speak at all or be voiced by a different actor.
"We’ve heard a lot of talk about Marvel wanting to have me play a character that doesn’t have my voice. So my voice is used for Groot and my presence is used for the other character."
The habit of talking openly about prospective Marvel deals is quickly joining over-the-top action movies as Diesel's hallmark. He has previously spoken out about roles before they are finalized, updating his Facebook page about his meetings with Marvel before he was formally cast as Groot. It's possible that these latest comments are in reference to the delayed Marvel’s Inhumans movie, which Diesel has been teasing his involvement in for years.
Diesel has often posted references to the Inhumans and Dr. Strange films to his Facebook including this not-so-coy nod: "Vin and Marvel... you all made it happen! I get the strange feeling that Marvel thinks I'm Inhuman... Haha." This led many to speculate that Diesel could play the role of Black Bolt. This sounds increasingly likely as that character is known for rarely using his voice, and requiring an imposing physical presence.
With all of this discussion and publicity it seems Diesel is poised to take on another Marvel Phase Three role. However, all of this speculation should be taken with a grain of salt as it could simply be Diesel using his own platforms to market himself and jump start or continue those conversations. We'll have to wait and see if these talks materialize into anything concrete, but after Diesel's much-loved turn as Groot it would be interesting to see how the actor takes on another Marvel character using only his physicality.
Captain America: Civil War will release on May 6, 2016, followed by Doctor Strange – November 4, 2016; Guardians of the Galaxy 2 – May 5, 2017; Spider-Man – July 28, 2017; Thor: Ragnarok – November 3, 2017; Black Panther – February 16, 2018; The Avengers: Infinity War Part 1 – May 4, 2018; Ant-Man and the Wasp – July 6, 2018; Captain Marvel – March 8, 2019; The Avengers: Infinity War Part 2 – May 3, 2019; Inhumans – July 12, 2019; and as-yet untitled Marvel movies on May 1, July 10 and November 6, 2020.