This might be the most excited i've EVER been for a fight. It's Mousasi, in the freakin' UFC! Gustaffson will most likely strike and trade with him, which favors Mousasi. If Gustaf tries to mix it up, he has a chance.
I think Gustaffson is more likely to grapple with him. Mousasi is most dangerous when he's standing and his TDD suspect. Gus has wrestled with opponents in the past so I expect him to do the same here.