When his agent is telling everyone that the Celtics are his Plan A, Plan B, and Plan C, I'm not too worried about Green not returning. I'd imagine the C's want some language in the contract to protect themselves if Green's heart condition becomes an issue again, and Green wants as many dollars as possible to be fully guaranteed. C's may also be having issues getting the contract insured. The fact that it's not announced; it's a lot more complicated than most deals.