The rumors surrounding a film starring El Chapo are likely a mixture of:
* Misinformation and urban legends: Rumors about El Chapo's life and exploits often spread quickly and are sometimes embellished or fabricated.
* Misinterpretations of media coverage: There have been documentaries and news reports about El Chapo's life, but none have been fictionalized films starring him.
* The popularity of narcocorridos: Narcocorridos are a type of Mexican folk music that often celebrates the lives of drug lords and other criminals. It's possible that people confused these songs for a fictional film.
Therefore, there is no official cast list for a nonexistent film "El Corrido del Katch - 2010."