There's a couple of factors that could be important from the league's perspective, I think:
Did he keep playing. If he's that out of it to make a lapse of judgement or not be aware of what he was doing then he would have need to go through the concussion protocall and possibly miss the rest of the game. From the video it looks like he just sits on the bench. Anyone know what happened afterward?
One thing that's in Wideman's favour is the fact that the play seems to be coming right at him. If he didn't go in line with the ref then it looks like he might have been hit by the nashville puck carrier. He could argue that, being out of it, he saw a quick flash of players bearing down on him and put his stick up defensively.
All in all, I think this looks like he'll get suspended for quite a while. He doesn't just crosscheck, he kind of jumps into it as well. He looks pretty in control of it to me. I don't even think the hit on Wideman should have been a penalty and I though he's spun around, I don't think he makes head contact with the player or the boards. Could have been whiplash effect, though.