Probably a mix of deleted scenes and footage from previous installments.
The sky is the limits creatively regarding what footage to potentially use. The real issue is not having real-deal Tom Kane narration for the ep.5 and ep. 6 crawls which is too bad. If any of you here can do a solid Tom Kane impersonation though, please let me know.
I’d love to do edits for those 2 as well. Heck, I’d love to do edits for all of the movies with Tom Kane narration.
You could always try and e-mail him?