Yes, I thought it was an April Fool as well. Why would Alan Shearer risk his reputation to return to Newcastle as manager? Well, he can't lose can he? If they stay up, he's the saviour. If they go down, it was someone else's problem. And he can learn the ropes bringing up the best supported team in the Championship.
He's only ever won one medal as a player, with Blackburn Rovers. It must stick in his craw that he put his heart before his head and went to Newcastle instead of Old Trafford, where he could have won everything.