The MINDSTORMS team has gone through some dramatic changes (as have many LEGO departments) and the marketing team is brand new.
As an anecdote, last year I had the opportunity to interview someone from the Boost team. I had a whole list of technical questions about the platform, but it turned out the person who gave the interview was one of the model designers and didn't know a thing about the technology behind the platform - not even that it was the basically the same technology as the WeDo 2.0 platform. We still had a great interview talking about the model though and I got a chance to play around with the app.
Some things you can ask about:
2018 marks the 20th anniversary of LEGO MINDSTORMS. Will there be some kind of celebration? How has MINDSTORMS evolved over the years and what do you think are its strong points? The MINDSTORMS
You could also ask about the MINDSTORMS display in the LEGO House, but again, there is a good chance the person(s) doing the interview will know next to nothing about it.
I could think of dozens of "good" questions that won't get an answer either, even if they are not about future products, like why the MINDSTORMS Gallery was deleted and replaced by a new dumbed down version (no option for the users to upload building instructions or code). Or why there is no PF > EV3 conversion cable to create at least a basic compatibility between the platforms.