Work with them on a product roadmap?

I've seen folks wanting big changes and we sit down and draw things up and surprisingly it looks like the old roadmap. Everyone is happy and I don't say anything about the similarities, and most importantly we're on the same page ;)

Sometimes when leadership asks for big changes, even when they say big changes, you might find if you get into the details it's not THAT big a change.

In the meantime don't let your mind run too wild assuming and worrying about what they might be asking for. I do that too, it's a developer thing I think, we start considering possibilities or even misused terminology and we get into a loop ;)