Yeah, he's going to the NFL either way.
I still think if he doesn't come back at all this year his draft stock drops. Like it or not, talent gets forgotten if there's an injury that prevents someone from playing nearly a whole season.
And to be clear, he isn't dropping to the 2nd round. I mean he might drop from 1-2 to 5-7. Big deal. I wouldn't rush it either way, just saying, he won't be a possible #1 overall pick if he doesn't come back and get some film against top talent.