Interesting. When I read this, I don't see an evil Superman so much as an insane one.
Normally something like this would bother me, but this Superman was clearly insane. There is no relationship, or at least there isn't at this point.
I think the sad part would be if this had been Clark and something had driven him to the point of insanity shown here. If it were our normal Clark, and something happened to him to bring him to this point, then this would be a very sad story. In that situation I would favor a continuation to see about a chance of redemption. However, given that he is a triple-digit multiple murderer, even if his mind could be recovered, I see no future.
So, as it is, it makes for an interesting Lois-takes-down-insane-Superman story.
Bob