If Diesel comes on board, he would play the tree-like alien in the James Gunn-directed movie, reported Deadline.
Diesel posted a caption less picture of Groot on his Facebook page before taking it down.
The Groot character can absorb wood to gain strength and recover from injuries as well as control trees. While hyper-intelligent, the alien seems to only ever say the line 'I am Groot' over and over to those who cannot hear his real voice.
It is not the first time that Diesel has hinted about his involvement with the movie.