I don't see both Joseph and Christmas making the roster. I think they'll go with 14, and leave a spot open, as well as save the bi-annual. My hunch is Joseph, but I haven't seen the summer games.
With AB out, rotate Rondo, JET, and Lee, with Dooling getting spot time, and possibly even Paul sliding to the 2 on occasion if needed, with Green at 3.
You can bet money there will be guys to go after later in the season, and there's no one to add at #15 who will make any kind of impact this year, hence by belief they will go with 14....with Fab and #14 getting time in D League.