I haven't watched the interview yet, just read the transcript; so I don't know how it came across. It didn't read like he was joking, though. Especially given the way it seems he jumped in to complete the guy's question, and went straight to "reunion tours".

I can think of any number of more general ways to fill in the blanks before I'd get to something that specific - unless he has reason to think that that's in the band's future.