Eek. Probably will miss WrestleMania. Even if he heals at the fastest rate, he won't get a meaningful feud in time.
From the doctor on WWE's website:
“Randy has suffered from a dislocated shoulder. He’s had chronic problems with his shoulder, and a recent MRI that was done found he has a Bankart lesion in his shoulder, some stretched ligaments and a partially torn rotator cuff,†WWE physician Dr. Steve Daquino told WWE.com. “At this point it’s a matter of when he dislocates the shoulder again, and not if. Surgery seems imminent, and recovery time for such a surgery would be four to six months.â€