42 is reference to the Guide to the Galaxy , and We – humans are the answer. So you can be any age to join, but you have to agree we have goal and Galaxy is ours.
The ultimate answer is the result of our efforts, and is combined out of small answers of each of us. And by providing the answers, and combining them, We build the Ultimate answer for Everything.
At the point in time the next step for We is the space and might be something new and unusual on Earth which comes from our efforts to get to space, or from things we do in space.