Isn't it just the Nether Realm pose. I only saw one hand raised with clenched fist, palm side up.
I imagine that's the pose.
And I expect it will be some iteration Scorpion (clothes, etc.).
I think people are over thinking it.
Perhaps Jerry has more artistic licence with MK like he did back in early SF statue days.
So he's just like, I'm going to do Scorpion in the Nether Realm pose. Maybe it will be Klassic. 1/3rd is a risk so you have to start with a sure fire winner.