Do I need to pay extra for Minecraft on the Xbox One if I already bought Minecraft on the Xbox 360?

Do I need to pay extra for Minecraft on the Xbox One if I already bought Minecraft on the Xbox 360?

Sources would be appreciated. I believe I heard that in a year if Xbox 360 Minecraft owners didn't upgrade to the Xbox One version they would have to pay the whole price?

Yes, but you do get it for only $5 instead of the full $20 price.