Destiny: Taken King Announced (Sep 15 2015, New Subclasses, Returns to Halo Roots)

[ethomaz]

Dr.Vita said:
It is just a dlc, isn't it?

It is a big expansion with a retail release.

There were two minor DLCs: TDB and HoW.
One major expansion: TKK

From the leaks TKK is about 80% of the orignal release content... the Raid is the biggest one from Bungie too and there are new Crucible modes.