Ok, I read the spoiler rules but nothing is mentioned about posting info from the comics. If you don't want to hear speculation based on comic info, skip me now.
Still here? Cool. - Dr. Kozlov, who runs Simpson's former Spec.Ops team is a Russian scientist who finds a dragon and tricks it into a rocket which is sent to Mars. Stay with me here. The 4th Netflix/Marvel collaboration is supposed to be Iron Fist who gains mystical powers by fighting and killing a dragon. I suspect we will see Dr. Kozlov again, perhaps in a bigger role in Iron Fist.
Incidentally, the chemicals that blinded Daredevil were in containers marked with the logo of the Rand corporation. Owned by Danny Rand/Iron Fist.