The WWE and CM Punk had a rough falling out last year to the point of lawsuits and settlements reached over their break up. CM Punk went on to sign with UFC and the WWE machine moved on without him without mentioning his name on tv again.
Last night the WWE Instagram account posted that photo of CM Punk and teased his WWE return to Raw claiming he quit the UFC. The post was deleted soon after but screenshots, you know. So it lives on through the interwebs. Either someone is getting fired for this or it was some publicity stunt. Either way, some people will be fooled and may even tune in to see whether he shows up. There are no reports of Punk quitting the UFC and it may have just been a hack job so keep your hopes down.