User:SOTO/Forum Archive/Inclusion debates/@comment-2.26.183.189-20170416191252/@comment-1783865-20170424134331
From Tardis Wiki, the free Doctor Who reference
A recap of the previous episode's ending is different from this.
I'm in no way saying it wasn't due to fit in the other, but the story itself had many obvious differences to the scene in The Pilot, besides some parts being left out. The trailer fits into that part of the episode, but it isn't a part of the story itself. Think of The Doctor's Meditation (for example). If the story in that prequel was re-made for the purpose of being put into the episode The Magician's Apprentice, the entire prequel itself would become invalid due to the entire storyline becoming part of the final episode itself.
