Tyrese says he has no beef with The Rock, but he did insert himself into The Rock's world by responding to one of Johnson's posts -- that didn't even seem connected to the "Fast" franchise at all. Tyrese's concern is apparently that The Rock might sign a deal for a "Fast" spinoff following Hobbs, potentially delaying the scheduled release date for "Fast 9."
The Rock can't exactly complain about people taking their beefs to Instagram, since he made this move famous last year when he called his male "Fast 8" co-stars "candy asses." There's been a lot of drama in the "Fast" family and we can probably expect it to continue through "Fast 9," "Fast 10," and the inevitable spinoffs.
"Fast 9" is scheduled to open April 19, 2019; "Fast 10" is scheduled for April 2, 2021.