I am just finishing my computer science PhD. It has five research chapters. The first four pose many research questions and answers all of them; they are complete in this sense.
The fifth chapter is a bit odd. We have just launched a three-year field trial of vehicles. I was responsible for many of the field trial design parameters: Who are the participants, how do we measure and gather data, how do we transmit data, what hardware/software do we need, etc.? Most of the chapter is methodology-focused and talks about all of these design decisions and how we made them. However, I am graduating (my defense is in a few weeks), and many of the interesting research results of this trial won't be available for months/years after a significant amount of data is collected.
So my question is, is it odd to have a chapter of the following form? “Here are a bunch of really interesting research questions, and here is how I helped design a trial to answer them, but that said, I do not present all the answers here because they are not known yet.”