The Dark Below and House of Wolves will upgrade for free due to the digital upgrade promotion as it was only for year one content. The Taken King is the start of year two and therefore not in the Digital Upgrade Promotion and will need purchase. You can read more about it [url=https://www.bungie.net/en/help/article/12122]Here.[/url] If you bought Destiny digitally before or on January 15th 2015 by 1am Pacific Central then you will be able to download Destiny on the next gen console for free. If you bought it digitally after that date or any time by disc then you will need to purchase it for the next gen console.