Re: If i buy Premium later, will it upgrade the Deluxe version of BF1

hey @RedRampageGaming, 

Not sure if i got your question right but, only difference between Deluxe and Ultimate edition is that Deluxe don't have Season Pass in it. Other than that it is the same. So in case that you buy Deluxe Edition first you get all additional content (Red Baron stuff, Lawrence stuff etc) and packs. Having this in game, when you purchase Ultimate you most probably wont be granted those packs/stuff again. 

In case that you have Standard version, planing to buy Season Pass ( premium ) it won't upgrade to Ultimate edition. You will have Standard version plus Season Pass. 

Hope that helps 🙂