I don’t think that we can produce a Homelander. We could have people that start producing designer babies. With enough time and low regard for collateral damage, we could have people designed to be highly intelligent. We could have children edited to be male or female. We could have children edited to not manifest African phenotypes regardless of parentage. The sky is the limit.
You don’t need CRISPR for sex selection—-it can already be done as part of the preimplantation screening for IVF.
For the other things, the best editing technique in the world is useless without a known and well-defined target. Intelligence is certainly partly heritable, but it’s not like there’s a single switch that needs to be toggled: genome-wide association studies find hundreds or thousands of linked genes—-and many of them likely have multiple functions. I would bet over-expressing any single one of them leads to many, many more problems than it solves.