Badcotune wrote: Steve's big "F.U." to Sony. As an Artist, your most valuable commodity, your most valuable weapon in negotiation is your craft, your skill. Steve did the album because he wanted to create new music. He walked away to teach Sony a little lesson about "No Support." Even though it's His music, in Perry's skewed ego and mind, he was showing them -- giving back a little of the bad taste they served him. One bad turn deserves another.
It's a plausible theory to some extent - except if Perry really wanted to give Sony a "big F.U" he could have refused to record the album. Instead Perry showed up, honoured his contract and the record sold over a million copies for Sony.
Sure, the opportunity for revenge probably did present itself at a later point - but it might have been in addition to many other factors too...the hip, the concerns about his voice on tour, the reluctance to spend all his time with old bandmates playing the same old songs and so on.
Yes, I'm sure Sony's treatment of his solo stuff made him feel less obliged to promote the album - and Sony's protestations probably did give him a certain satisfaction - but I doubt he rejoined Journey as part of some sinister masterplan to 'get them back'.