4. Spider-Sense
One of Batman's key strengths is his ability to move around unnoticed, hiding in the shadows and ambushing his opponents before they even know he's there. In a fight with Spider-Man, even in a location or setting that would seem to favour the dark knight, his stealth would simply be cancelled out by Spider-Man's spider-sense. As soon as Batman came in to Spider-Man's vicinity with intentions to attack him, the spider-sense would kick-in and alert Parker to his presence, negating any advantage that he thought he might have had. Essentially, there'll be no hiding from and no sneak attacks on Spider-Man. His acute superhuman senses will see to that. It's also worth noting that Spider-Man's pretty stealthy himself. Not that he'd need to be in a fight with Batman, given the overwhelming difference in their physical stats.