Man of Plastic! Or maybe The Brick Knight Returns!
That being said, this Lego set, #76044, "Clash of Heroes," was a must-buy. The Kryptonite is useful, and that Batsignal is great, but the minifigures really sell it. Frank Miller-esque end of "Dark Knight Returns" armored up Batman? Sure. Superman in a costume that's light years better than any of his New 52 togs, and a new hairpiece to boot? Yes, please.
Also, the fact that it's a Batman v. Superman: Dawn of Justice minifig that gives us the first Lego Superman head that's not only not-glowering, but full-on smiling (the other side features a presumably-more-movie-accurate heat vision eyes & snarl combo)? Irony like that is too amazing not to support.