Scanbro has struck again. The naughty comics pirate who leaked Amazing Spider-Man #1 and Civil War 2 FBCD has just leaked Inhumans vs. X-Men #0, in stores on Wednesday, in its entirety. Scanbro has a long history of leaking key Marvel stories early, and it's been speculated in the past that he may work in a comic book store, which could give him access to the comics he scans early, even if comes at the expense of cannibalizing the direct market that employs him. Whoever Scanbro is, he is unlikely to have very many fans inside Marvel, and especially not Dan Slott.
In this particularly case, however, he may have wasted his time. Nothing of any real consequence appears to happen in the book, so at least you don't need to be on the lookout for spoilers.
As for Marvel, they may be off the hook for the foreseeable future:
No, I'm not scanning anything else. No, I don't have spoilers for anything else. No, I don't know the next time I'll be doing a storytime.