I'm excited for this to finally be making some progress. All i know is that there are plans to release this, I don't know when exactly, but I do think it will be. I love the idea of 6 hours of extras, that would be incredible. I don't think John is jeopardizing anything by wanting to put the extras. At worst they say "No" for the extras, that doesn't mean they can't do any of it. And if they say yes, then fucking brilliant.
There's no way he could leak this and not have it come back to him, considering he's pretty much the only person who has control over the handling of the film right now. It'd be pretty easy for them to track it back and he runs the potential of REALLY annoying the band. If they asked him not to release it yet for some reason, then I'm sure he's cool enough to realize that their friendship is more important than leaking stuff out to their fans. At the end of the day, it's them and their material, and they have the right to ask him not to release it.
I barely know the guys (personally) and when they ask me not to post something, i don't even second-guess it. Not out of fear for getting sued, but simply out of respect. I can only imagine how i'd feel if I was actually their friend.