Who has Batman defeated?
Superman
Darkseid
Lex Luthor
~3 or 4 White Martians ("strong as superman, fast as the flash")
Ra's Alghoul (Wolvie fights the Hand soldiers, Batman fights the leader... who is older and a more experienced fighter than Wolvie, btw...)(Most recently, he killed Ra's with only the physical prowess of an AVERAGE billionaire playboy)
Justice League[Flash, Green Lantern Rayner, Superman, Wonder Woman, Martian Manhutner, Aquaman] (by way of Ra's Alghoul) --- I hesitate to count this one, since y'know, they were all sleeping, though all those things could've been carried on the bat-belt...
Multiple Predators
Captain America, technically
Clayface (like to see Wolvie beat him...)
In each and every case long multi-battle bouts ended in Batman using the character's mental and physical weaknesses against them... EVERY SINGLE ONE failed to overcome him in their first battle. Armies of Superman-killing Doomsdays, Cyclops-sized blasts of heat vision, turning the entire population of the world against Bruce and making it IMPOSSIBLE for communication of any sort anywhere to take place... it didn't matter, Batman's too mobile too resourceful... he comes back and decimates his opponents, no matter how much stronger, faster, regenerative, old, 'all-slicing' or whatever...
The only person that comes to mind that can beat Batman is Deathstroke, who has all of wolverine's strengths and ON TOP of that, is a crafty sunnuva gun. He's not just 'the best at what he does', cuz that's not enough, he's all that and he's a genious when it comes to planning the downfall of his opponent both pre and mid-battle... just like Bruce. Oh, btw, Batman's beat him a few times too. So has Robin.
Can Wolverine even beat Robin/Nightwing?