I put my BL1 disc into the Xbox One and had to get an 8GB download. I had purchased none of the DLC for BL1 on Xbox 360 in the past by the way.
Once I started up the game on Xbox One, I immediately had access to all of the DLC’s for free.
I am not sure if this is intentional or a glitch but my friend is the same, he got DLC for free. I then put my disc into my girlfriends Xbox One and she got the DLC for free too.
Not quite sure why though o.O
Anybody else get free DLC?