So, I just realized something as I was sitting here listening to The Right Time with Bomani Jones: as a result of the Seventy-Sixers declaring Joel Embiid out for the rest of the season, Embiid will end up not playing in enough games to be eligible for Rookie of the Year. The only other rookie averaging double-figures is Dario Šarić. Šarić is averaging all of 11.3 points and 6.2 rebounds per game.
Rookies who may still have a shot are Malcolm Brogdon (MIL), Jamal Murray (DEN), Brandon Ingram (lal) and, incredibly enough, Stephen Curry 2.0 (SAC). Yogi Ferrell has been coming on strong for Dallas but, as I understand it, the Mavericks don't have enough games left on their schedule for him to be eligible.
Between those guys, I would probably personally give it to Murray, if the Nuggets make the playoffs, but then that would be precedent-setting, in that there has never been a Rookie of the Year recipient to average single-digit points for a season in the history of the award: Murray is currently averaging 8.9 points per game.