Yes in general this is a fairly esoteric question. I had a very specific reason for considering it however, which I'll share with you.

What percentage of the 6.7 billion people on earth would it be moral to kill, say in a demonstration of the possibility of existential risk, in order to someday realize the eventual existence of 10^23 lives in the Virgo Supercluster?

If we consider the creation of new people with positive utility a moral imperative, it would seem that killing any number of today's people, even over 6 billion, would be justified to even marginally increase the chances of creating a trillion year galactic civilization. This doens't make sense to me, which is why I was looking into the issue.