In fact, the Fast & Furious star recently told MTV News that a solo Groot film is "inevitable."
"I think that character is so enigmatic," said Diesel, who voiced the laconic tree monster in the 2014 blockbuster. "He was already one of the most unique characters in the Marvel universe, and I think what Marvel has done — primarily what [director] James Gunn has done — to realize that character has exceeded beyond any of its expectations."
Diesel went on to say that he's already spoken with Gunn about helming a Groot spinoff, and it's "something that I know that he would love to do."
The 49-year-old action star even teased what he would like to see in a standalone project, explaining that he "would love to go back to [Groot's] planet and learn more about him."
Admittedly, a solo project would present a few challenges -- not the least of which is that Groot basically only says "I am Groot" to express every thought and emotion he has. However, if Pixar's WALL-E taught us anything, it's that a verbose main character isn't a necessity for an emotionally powerful sci-fi epic.
While Diesel might only say "I am Groot" in GotG, he put a lot of work into nailing the emotional core of those three words -- and he also learned to say the phrase in a multitude of languages. Check out the video below to see how much work went into his celebrated voice performance.