Interesting titles. Man of Steel: Black of Knight just makes me think of the Martin Lawrence comedy Black Knight, though.
Out of the titles mentioned, I kinda like Man of Steel: Battle The Knight (which actually kind of tells you what the movie is about) or Man of Steel: Knight Falls (even though that hints that Batman will lose/fall in the film).
What I find most interesting is that if these are actually titles WB is considering then that means they want to keep the Man of Steel moniker and pose this more like a legit Superman sequel, rather than a crossover film. Batman vs. Superman or Superman vs. Batman would give equal weight to the two characters, but Man of Steel: Subtitle would imply Batman is more of a secondary character. It feels more reminiscent of Fantastic Four: Rise of the Silver Surfer. Which would be an interesting choice.
I think for the longest time people thought Batman was going to overshadow Superman in this, but if these titles are any indication it looks like WB still wants to push this as a Superman sequel but with Batman making an appearance. Which will probably please the Superman fans that were upset Batman and his universe was going to crowd the Man of Steel sequel.
Honestly, though, anything is better than Batman vs. Superman or some variation thereof.
