Okay so I don't know about you but I'm like 92% positive that EXO's Wolf is real--why? Because their voices are very obvious--it's been tampered with(the pitch and whatnot) but all in all it's real.

And no. It was not leaked. It was a purposeful release--ever heard of marketing strategies?

This is one of them--SM is probably iffy about whether or not they want 'Wolf' as the title track. American artists do this all the time when deciding which song will be the next single--they generally release it on radio though and gauge the public's reaction. SM is doing something similar and if 'Wolf' is well-liked/received than they'll keep it as the title or an album track if it's not liked then they're scrapping it and EXO's comeback is delayed.

All in all--the song was probably intentionally leaked and a real song. It was tampered with, yes, I'll give you that but it's not a fake. That's highly unlikely.

Also before people start asking why SM is taking down some of the songs uploaded on Youtube and SoundCloud--precisely because of that. Everyone thinks it's a troll, a fake. If SM's marketing strategy is going to work they need to take a few of the violators' songs down to 'prove' that, yes this IS EXO's song and yes it is them singing. Notice though that not all of them are taken down? If they really wanted to--they would ALL be taken down. Not some but ALL. 

Also Tony Testa's resume has been cleared of the 'Wolf' choreo--that's because now 'Wolf' is on the line between keep and scrap. Until it's confirmed that 'Wolf' is a keeper--Tony Testa's resume won't have 'Wolf''s choreo included.