Guesses:
Nollie Bigspin, Nollie Heelflip, Switch Flip (FORTUNE!!!!!) or some sort of switch heel variation.
Sidenote:
Initially I thought these sorts of teasers would kill my anticipation for tricks but it's the complete opposite, like when I'm finally watching a part I've been waiting on and know a trick that has been done on a landmark spot, I've been more excited about the part and trick in general to the point where I enjoy the part that much more. This is the one positive of this era of social media teasing of serious tricks.
Thanks (again) skateboarding.