My guess is DBZ Kai will likely take a break for FLCL S2 at 11:30, leaving Super at 11. I also see that to be potentially best for Toonami as a whole, as brand-spankin' new FLCL would likely gain 20% or so over a glorified DBS encore.
There's no need for DBZ Kai to air each and every week, and a split-arrangement with FLCL may actually be the best way to stretch it out through 2018.