If it were really not happening, he would say, "It's not happening, Property of Zack was wrong." Of course he denied it, what's he gonna say, "Welllllll, I don't knowwwwwww, you're gonna have to seeeeeeeee!"
Imagine Patrick and Pete just told Zack it was happening and said to post it to build hype. This is still the band that used to hide shit in their source code, right?