I couldn't really find much literature on what kind of adhesive to use or how to ensure that the curve would remain rigid after a glue up. I reckon it's because this is more of a technique used for structural purposes and those pieces are secured by more than just glue.
In any event. I figured some splines would give the curve & glue something to grab onto, but I didn't want to do through-splines. Setting the circular saw to not cut all the way through the plywood allowed me to rock the saw down onto the kerfs to create another kerf for the splines to seat into. For more information on this technique, search "circular saw plunge cut", though this is a slightly modified version as I'm not cutting all the way through to continue the cut.
This is my favorite gif, it's just such a satisfying lining up of all the perpendicular kerfs.
