Oh. I missed the last question before. I would NOT count Vixen as a speedster. Not just because the power is incidental and not permanent, but more importantly because it’s not super speed in the same way. Its like I was saying about Spider-Man and the Beast. When she is running like a cheetah she is faster than regular people, buts she’s not fast in the same super way that Flash or Quicksilver is. Her power is mimicking an animal that is faster than people should be but physically possible. Their power is to exceed typical abilities beyond the limits of physics and thermodynamics.