As mentioned, The Rock showed up after Raw and called CM Punk, leaving him a voicemail with the crowd chanting his name.
According to PWInsider, WWE management “did not appear to have been happy” with The Rock doing that, and at one point, someone apparently was sent to ringside to ask Rock to get off the topic. The Rock also said “they better not turn off my mic” at one point. WWE obviously had nothing to do with it and it was a “spur of the moment” thing after the crowd began chanting “CM Punk” on their own.
WWE and CM Punk are still not on good terms after CM Punk left the company in January 2014 because he was not doing well physically. Punk claimed that a “lazy” WWE doctor ignored an MRSA infection and that doctor (Chris Amann) later filed a lawsuit against Punk for slander. That lawsuit is expected to go to trial in summer of 2018. CM Punk claims that WWE is funding the lawsuit to get back at him, but WWE denies that.
WWE also apparently sent CM Punk termination papers on the day of his wedding (damn), which Vince McMahon later apologized for on The Stone Cold Podcast. Stephanie McMahon also recently took a shot at CM Punk a few weeks ago after the crowd began chanting CM Punk at her in the ring, saying, “if you guys could keep that up for about two minutes and 15 seconds, you’d last one second longer than Punk did.”