There's been none on here. However the team on here were responsible for this great Q&A with John Wardley on TowersTimes back in 2010:
click me.
The problem with having a future Q&W with Wardley is that his career is so well documented at this point it's hard for there to be any new interesting questions asked. I would be interested in knowing about the later years of his career. Although with all the secrecy it's unlikely we'll hear any ins and outs of Merlin the past 5 years for a good long while.
But yeah, on the whole I don't really think there's much more that can be asked. A lot of his career can be found documented online and now in his autobiography.
I personally would rather see the team get a Q&A type thing with Candy Holland. I'd love to learn more about her career and learn more about her overall. She's someone we know has worked on previous Alton Towers projects. Another person I wouldn't mind hearing more about too is Chris C (not sure if I can go putting full names of staff on here), the head of entertainments at Alton Towers. He's been responsible for a lot of the changes in entertainments and events we've seen the past few years at Alton!
I think if the team were to ever look into a Q&A session, someone that we know little about would be more interesting.
Of course if they got John doing one again I wouldn't complain, it's always nice to hear about John's work and his views on the industry.