They are having a sale later this month, http://blog.us.playstation.com/2013/04/09/spring-f
first off, don't be rude. Secondly they do correlate due to that it is a huge psasbr sale and with all that hype it would make sense to annouce the new charecters then to give people rational to buy the game.
They said: and Game Sales for some of the big name characters in the game.
I don't know what that means, but it could either be new dlc characters or sale on Kat, emmet, Zeus, and Isaac.