1: Dwayne Johnson stars in The Smashing Machine as MMA icon.

2: The Rock undergoes transformation for new movie role.

3: Fans shocked by Dwayne Johnson's unrecognizable appearance.

4: Johnson's dedication to portraying MMA legend is praised.

5: Behind-the-scenes look at Johnson's intense training regimen.

6: The Smashing Machine reveals Johnson's physical transformation.

7: Impact of Johnson's role as MMA icon on fans and critics.

8: Dwayne Johnson's commitment to authenticity in The Smashing Machine.

9: Johnson's portrayal of MMA legend hailed as career-defining performance.