Which Borderlands 2 DLC's are not included in GOTY edtition

If you buy the GOTY Edition you'd still have to buy the Headhunter DLCs and the Ultimate Vault Hunter Upgrade Pack Two: Digistruct Peak Challenge DLC.

Since a lot of other DLCs in addition of the season pass DLCs are included in the GOTY edition it's better to buy GOTY, even if you already have the base game.

Source:

The package will contain:

  • The main Borderlands 2 game
  • All DLC included in the Season Pass:
    • Captain Scarlett and Her Pirate's Booty
    • Mr. Torgue's Campaign of Carnage
    • Sir Hammerlock's Big Game Hunt
    • Tiny Tina's Assault on Dragon Keep
    • Ultimate Vault Hunter Upgrade Pack 1
  • Gaige the Mechromancer
  • Krieg the Psycho
  • The Heads and Skins included in the Collector's Edition
  • The Creature Slaughter Dome
  • The Gearbox Gun Pack
  • One Golden Key
  • The Vault Hunter's Relic

NOTE: The Edition will not contain any of the content released after its announcement, including any Head Hunter DLCs and the Ultimate Vault Hunter Upgrade Pack Two: Digistruct Peak Challenge.