Will Ian Book be the next Saints QB to beat out Taysom to be the starter?

I really like Taysom Hill. He will go down in NFL history as having carved out the most unique, and specialized positions in the NFL. That we have seen in a very long time. He is a great teammate, and is a team first guy. But, If Trevor goes down, will Ian Book be the next Saints QB to beat out Taysom to be the starter? Will (medically cleared) Taysom Hill be activated to play the joker roll? Will Taysom, just hold a clip board for the game as QB2? Will Ian Book be activated to play QB2?
If Winston doesn’t come back….hopefully it would be for the reason of Ian Book doing extremely well.