Crossing fingers season is not over... We will see what the doctors say
I'm almost positive Hayward could be back if they wanted him to come back. While the dislocations and breaks are horrific looking injuries, they aren't the worst injuries. Look at Kobe, you couldn't even tell anything happened to him other than his limp, but a torn Achilles tendon is something players have a really hard time coming back to their old selves from. Edelman's knee injury didn't look bad at all, most of the time that is a two year injury before the player has all the explosion back he had before.
Seriousness wise, I don't think this injury is that bad. Bones heal really well and remarkably quickly. Often the bone is stronger after it heals than it was before. Other than that San Fransisco pitcher, I think it was a guy named Black but I could be wrong, who had a tumor that weakened his forearm and Romo with is clavicle, I can't think of any athlete that has broken a major bone, not including something like the hamate bone for hitters, more than once. Dislocations pop back in and as long as all the tendons aren't torn it is like a really bad sprain.
I wouldn't be surprised to see Hayward back in late January or early February. Athletes at this young age heal quickly. How effective he will be could be another matter with his conditioning and skill loss from not playing.