How much prep time? And how does Spidey with prep time stack up against Batman with prep time. They're both ultra smart.
Gotta go Spider-man here due to being highly intelligent plus having unnatural powers. He wouldn't pass a USADA blood test for a second with dat spider blood but as long as he doesn't get popped, he's going to murk Batman and Robin. Robin particularly would have virtually nothing to offer as he is agile but not Spider-man level agile.
Also I find it kind of funny that Batman's whole plan in Batman vs. Supes was predicated on the notion that he would have enough time to use the Kyptonite on Superman. But, as Superman points out, if he wanted to, he already could have killed Batman. So basically Batman had to hope to hell that Superman would not instantaneously torch him with laser eyes or fly into him at the speed of sound and absolutely decimate him. Which basically leads me to believe that Batman was assuming that Superman would not immediately try to kill him. And if he assumed that, how bad a guy could Superman be?