Partial Source: Pwinsider.com
-- The Boogeyman was booked as a one shot deal to surprise people and play into the "Tell Me I Didn't Just See That" award. According to reports, someone made a reference to him while in a conversation with Vince McMahon a few weeks ago and that is how the idea to use him came about.
-- Tommy Dreamer was a very last minute addition to the show, as the early scripts for the show did not feature him at all. The company contacted Dreamer late in the afternoon about appearing and he then drove in from New York. Dreamer has been visiting WWE headquarters as of late and there is interest in using him again. WWE actually never wanted him to leave the company when he did a few years ago.