If you were wondering what chances Batman might have against Superman, you also must have thought that he has found the Kryptonian's primary weakness. Obviously, that is Kryptonite and not anything else.
Well, we might just have the clear answer for you. So if you are into some potential spoilers, then read ahead! We can tell you from the start that Batman's knuckles won't be coated with Kryptonite.
Batman's weapon
The answer to your questions is given right in the first teaser-trailer for Batman v Superman: Dawn of Justice. And we can say that it isn't exactly a blink-and-you'll-miss-it scene. We can say, however, that your attention must have been distracted by something else.
El Mayimbe of Heroic Hollywood came up with this scoop, so take it with a pinch of salt. According to him, in what seemed to be the station where Superman killed Zod (or didn't), Batman is carrying a mysterious item in his hand.
As said, your attention must have been caught by something else, by the question marks on the columns (a potential Riddler reference, although we don't know what this villain might be doing in Metropolis).
So, what is Batman's weapon?
According to the above mentioned source, that item is, in fact a spear. But not just any kind of spear, but a very special one.
You must be thinking also that this might be the Holy Lance or the Spear of Destiny, who is also present in the DC comics. For once, in the comics, the spear made Hitler (yes, that Hitler) become immune to superhero powers and enabled him to control any superhero that came in his direct influence.
But it isn't such a special weapon, just like it isn't the spear that enabled Vandal Savage to take control of the Spectre. According to the source, it is instead a spear laced with Kryptonite.
As said, it isn't known how Batman became aware of Superman's weakness, nor is it known from where he has that element. Also, it isn't known why Batman doesn't have this weapon when he confronts the Man of Steel in the rain"¦ So that pinch of salt might just be a spoonful.
So what do you think? Is that a spear or not?