Yeah, it likely won't happen. If the C's are going to bring in borderline NBA players to fill roster spots, they're better off sticking with Pressey, Johnson, and Babb, who all already have experience in the system.
I'd also argue that during a rebuild is the least productive time to develop borderline NBA talents like Bertans and Moser into NBA bench players. During the Big Three Era we could have rationalized developing one of them into a long term solution as a backup. However, in a rebuilding situation like we are in now, cap space is king, so even if someone like Moser was to emerge as an effective backup wing, he'd likely walk as a free agent next year, as the C's aren't going to put the cart before the horse and give a backup wing any sort of contract.