I don't think so: "While this scene starts with the addition of Cooper, he will not be the major focus." I think he'll have his own scene but it won't be the focus of this entire chapter, I think after Cooper's scene the focus will be on just Ben and Gwen (I hope), and then the epilogue.
That's always been the case unfortunately, I think Incog drags a bit too much with Sultry Summer since SS has a bigger focus on the story than Chain Reaction, I mean it took 144 pages for Ben and Gwen to have actual sex while in CR Alex and Julie took 51 pages / Katie and Jack took 83 pages..