There's no doubt he will be in the game, but unfortunately it will probably just be a fictional representation of him (no face scan/headshot picture). One of the developers revealed on a Q&A stream that all of the new players that had their faces scanned at the Rookie Showcase will be for next year's game.
What about late college signees like Dylan Larkin? He decided to forgo his collegiate eligibility and joined Grand Rapids for the Calder Cup playoffs...