In the past two months, both Oasis and Rush have shocked fans by announcing previously unthinkable reunion tours . Which begs the question... who's next?

With apologies to Aerosmith , who seem to be heading towards at least an Ozzy Osbourne -style farewell show, here are the four biggest classic rock reunions that are still technically possible, if still very unlikely:

Journey and Steve Perry

Steve Perry hasn't completed an album and touring cycle as Journey 's lead singer since 1987. While the band remains among the biggest touring attractions in the genre, fans still go into overdrive upon hearing any hint or rumor that the original voice behind "Don't Stop Believin'" or "Faithfully" could one day return.

Perry has been very consistent about his lack of interest in doi

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