Beyond supersymmetry (where fermion and boson spins are exchanged) ideas to generate new spin classes for 'dark sector' entities may be required...
Schuster & Torro* (Perimeter Inst., 2013) have written up the quantum field theory for continuous spin entities. Prior to that work, I wrote up my own (seemingly crazy) ideas concerning fields/quanta with real-valued spin, inspired by Roger Penrose (and other's) work in twistor theory. It's unpublished but can be read online at my web** (4 pdfs, twistors and real-valued spin is 4th in the list...)
Hence, my question: Does continuous valued spin make light in(of) the dark sector?