I'm not that worried about Crosby. Some may be worried about his stats, but I never much cared for those things. I'm confident he will be back for when it matters.
I don't have any evidence to go on, except Crosby's toughness and Anquan Boldin. Boldin took a full speed hit to the jaw when Eric Smith put his helmet under his face mask. Boldin was knocked out and had to have seven plates and over forty screws to put his broken face back together. He also had to have his jaw wired shut to realign his bite because it was off so badly. The hit and injury was so gruesome, Kurt Warner considered retirement because of it.
Boldin missed two games and had nine or ten catches in the game he returned. Later that season he had 12 or 13 catches for almost 200 yards agt the Hawks and another 11 catch game as well. He still finished with 1000 yards rec on the year.
Anything is possible, but I seriously doubt Crosby's face exploded like Boldin's did. Boldin is tough cat, but so is Crosby.