Golden Daniels absence from the DLC is due to the fact i felt like he was not needed in it. Its been established in the Five Nights at Daniels 1 Night 4 call that the Phone Guy does not know who Golden Daniel is until Golden Daniel killed him and the phone guy just assumed that the original Daniel killed him.

Golden Daniel was Only Mentioned Vaguely in the Extras of the DLC and in the Credits where I Credited him for "Unoriginal Shit" because I felt like that would be a good way to put him back on the radar for the player to think about why he was absent in the game.

FNaD 2 will have him return but he will look a bit different than he did last time.