as an example of how they got there, she mentioned The Stand and The Dark Tower by Stephen King in her Colbert interview last night, and those books were released May 8 and June 10 respectively.
also, the 5th and 8th tracks on Fearless (Taylor's Version) have different visualisers to the others. 5+8=13 is Taylor's lucky number and also signifies May 8th. plus one of those visualisers shows a horse (although it is for White Horse...), and Wildest Dreams has been teased in the trailer for The Spirit, an animated film about... a horse.