Partial Source: Pwinsider
WWE purposely leaked Flair's voice (the WOOOOOOO) in the segment before he gave away the Superstar of the Year Slammy. This was done with the hope that the word would get out via social media.
WWE then spaced out Ric Flair's return on RAW over several segments in an attempt to maximize the rating for those segments.
As previously reported, Flair has not signed a contract with WWE.