The reason behind CM Punk's absence from RAW this week has reportedly been revealed. The World Heavyweight Champion has been dealing with a lot of things in his personal life and has not been in action since Survivor Series: WarGames.Having been pinned by Bron Breakker in the WarGames Match, the Second City Saint was written off TV. It was stated that he wasn't cleared to compete.Now that he has missed another edition of RAW despite being the top champion on the show, details have emerged regarding his absence. According to a report from PWInsider Elite, Punk was not present on the latest episode of RAW due to still being on set for filming of the Netflix movie The Bodyguard.It was reported last week that the Punk has been cast as Doghouse in the upcoming movie based on the Katherine Center novel. The WWE star's character in the movie is described as a "physically intimidating member of the security detail, who is known for his loyalty and humor."A week ago, Punk also missed WWE's flagship show after his beloved dog Larry passed away. CM Punk will defend his World Heavyweight Championship against Bron BreakkerCM Punk will be in action on the January 5 episode of RAW, where he will defend his World Heavyweight Championship against Bron Breakker.This announcement came after The Vision member pinned the champion in the WarGames Match following an interference from a masked man.This week on RAW, the former NXT Champion addressed Punk, saying he needs him to be the ruthless star he used to be. Breakker added that he wasn't buying the "nice guy" Punk and called him a fraud.He also warned The Voice of the Voiceless that he was going to break him if the old CM Punk doesn't turn up for their title match.