“All will learn what Jesus will do.”
We already know: NOTHING.
Besides, if he didn’t take the time to condemn slavery, why should we care about what he thinks about fetuses? Unless of course, it means more people to be born and become slaves worshipping him, well then, that makes sense.
And there are also many other things which Jesus did, the which, if they should be written every one, I suppose that even the world itself could not contain the books that should be written.
Therefore your assumption that Jesus ought to have been expected to catalog and condemn every known, past and future, type of human cruelty, violation and aggression, is mistaken.
Jesus was often confronted with moral quetions, and He tended to answer in summary rather than in catalog form:
"[Loving God] is the first and greatest commandment. And the second is like it: 'Love your neighbor as yourself.' All the Law and the Prophets hang on these two commandments."
Yhis leaves it on the honest questioner to ask himself: "Would I want someone to enslave me? Then I should not enslave other. Would I want someone to abort me? Then I should not abort others." And so forth.
That, with sufficient reflection, should answer most questions of morality.