About Lay's poster, fans are speculating he's playing an important role for this comeback since he's usually not in the middle. They say he will either be a neutral role or smtg. But we're also speculating who will be the neutral role for exo-k. Some say Baekhyun and some say Suho.
Also there's a leaked instrumental song by exo (most are hoping it's just a song and not the single). But since Baekhyun mentionned the new single will be different:
140401 baekhyun on sukira
baekhyun: “we’re coming back soon with a song that will make you think ‘oh, what is this? i want to listen to this once again?’”
That instrumental could be a hint of what he meant.
http://exoinsweaters.tumblr.com/post...-internet-as-a