Hey Silly, This is what I know - 1) Bungie DLC is [b]non-transferable[/b] between Microsoft accounts - if you bought 1 licence then you can only apply it to one Microsoft account. 2) 1 purchased TTK Licence for 360 will not work on XBOX 1 - even if it is on the same account. 3) Destiny Year 1 + expansion DLC I & II are upgradable to Xbox 1 provided they are on the same Microsoft account.....but you can't go back once you go there - so don't forget to say goodbye to your 360 mates when you make the change to better graphics and more exclusive gear. If I am wrong Bungie can correct me.......and while they are at it.......they can address my other posts. For everyones benefit.