As the San Antonio Spurs continue evolving into a contender, it's reasonable to expect more roster turnover after next season. That could mean players such as Harrison Barnes, Keldon Johnson, and Kelly Olynyk could be gone and replaced with younger or better-fitting options.
One potential outside-of-the-box option could be Brooklyn Nets guard Cam Thomas. Thomas is currently stuck in a contract dispute that could make him a free agent next season. He is currently a restricted free agent but has been lowballed by the Nets, who don't seem willing to offer him anywhere near what he's looking for.