Just the Renders have been confirmed in the Krypt so its probably safe to say the costumes themselves are not in the Krypt.
The supposedly "exclusive" Toasty! fatality has been confirmed unlockable without the preorder code, so while they may or may not be in the Krypt it is highly possible they are unlockable somehow.
Well the fatality is just a button sequence so it doesnt suprise me
Well the fatality is just a button sequence so it doesnt suprise me