The following is a translated message from Brazilian mixed martial arts mag TATAME:
"Master Rudimar Fedrigo confirmed to us first-hand that Mauricio Shogun will fight the American Forrest Griffin at UFC 76, which will happen on 22th September in USA."
Rudimar, the founder of the famed Chute Boxe camp, reportedly sad that he and Rua "went specially to Las Vegas to sign the 4-fight contract and record that pre-fight video that shows before the fight."
The news was also reported this morning on Tagg Radio.
The UFC, however, has not yet confirmed the bout, and until they do, I'll hold off on any "Run, Forrest, run!!!" references.