I may be completely off on this, but I think the whole thing is a joke. I saw him at a gig in February and spoke with him inbetween sets, and he had nothing but nice things to say about the band. Granted, this was before the documentary was released, but with the smileys in his post, I wouldn't take what he said too seriously.
Also, when I spoke with him, he did mention that since they did have such great chemistry together, that he, JP and Jordan were going to do some sort of project together, strongly implying that it would be a side project. He NEVER said anything about them collaborating on a solo CD of his.