If there's no prior planning involved, than the only superiority Batman might have is his brain, and while the Chief may not be as smart as Bats, he's still a genius. The Chief is stronger than the Bats, no question, but how much stronger exactly? In the books his unarmored state is said to be 3 times his own body weight, which is already twice the norm because of his augments. The norm in this case would be related to his height, which unarmored is 6 foot 10 inches. The ideal body weight for someone that tall is, according to [url=http://www.healthdiscovery.net/links/calculators/ideal_bw_men.htm]this site[/url] 210 pounds. So 3(210x2)=1,260 pounds. The armor, at least the Mk. IV, further doubles that to make for 2,520 pounds. Bear in mind, John's unarmored lift was calculated at the age of 14. This was relatively immedietely after his augmentations were completed and minimal further training had been accomplished. John's upper limit, at the age of 46, is actually unknown. But we can judge from the feats of other Spartans. Cal-141 was capable of lifting and tossing several meters away an ODST drop pod. I estimated the thickness of the pod on a range, and according to [url=http://titanium.com/weight-calculator/]this weight calculator[/url] and the usable given dimensions of an ODST pod (102 inches wide, and 90 inches long, titanium like all other UNSC alloys) an ODST drop pod is somewhere between 2992 pounds (2 inch thick) and 11,970 pounds (8 inches thick). This doesn't consider the height of the pod, an unsupported factor on that calculator, nor any of the equipment inside the pod. Not being mathematically inclined, that's the best I got as far as a Spartan II's strength, sufficient enough to lift and throw one of those pods several meters. Batman's peak is estimated to be around 1000 pounds. Let's look at speed. A quick internet check states that the fastest human ever ran at about 43 kph. That is Batman's peak possible speed, not counting for body specialization (a 1000 pound bench presser wouldn't have the agility of a gymnast for example). John's slowest speed was 55 kph, coming right out of the augments at age 14. Chief Mendez stated that as they age, they will only get faster as their bodies adjust to the augments (TFoR, pg. 73). Their speed and agility is further multiplied by the MJOLNIR armor, by a factor I cannot recall as of now. Reaction speed. Batman's reaction speed is difficult to calculate just going off of the dc comics database (my source). It says he can dodge point blank fire, which is a contradiction. Point blank is instantaneous to a human, even a peak human. At that range you're talking travel time in terms The Flash would be more comfortable caring about. What bats likely is doing is anticipating the shot, rather than dodging the bullet itself; also how he would manage to "dodge" a superman punch. Neo is dodging bullets, Bats is evading them (at least at point blank) I don't have the expertise or knowledge to give numbers on Bats' reaction time. We know that John's speed is, at rest, estimated to be 20 miliseconds, and "significantly faster" when in an adreniline situation, almost incalucuably so (pg. 73 of Reach). In armor, that is further amplified by a factor of 5, allowing John the ability to dodge automatic fire to a degree. They're so fast that they see in slow motion; the armor allows them to move at the speed of thought, which to a Spartan is already faster than a human. So the two of the three primaries go into the Chief's favor with the third a strong possibility. Let's look at technique. Bats famously exploits the fears of his opponents in battle. As in the Batman vs. Spiderman Deathbattle, his reliance on stealth would be an achilles' heel. The Chief can, even outside of armor, see in virtual pitch black. With the armor he has a built in flashlight, various vision modes including heat, and has a motion sensor going out in all directions for about 80 feet. As far as fear goes, the emotion is a virtual nonfactor for the Chief. While still technically experiencing fear, a liftime of training allows him mastery over his emotions. He's also ruthlessly efficient in a similar vein to Batman, capable of feats of stealth and problem solving that seems, to their trainer, "damn near telepathic." He can create maneuvers and pull resources apparently out of thin air, using items in training his own observers can't figure out the origins of, despite being under constant surveillance. On top of all that, Spartans psychologically become better fighters the tougher the challenge is. "The tougher the challenge, the harder they fight...the better their morale becomes." (pg. 74, Reach). Batman would easily be the toughest human challenge John has faced, but I can't see how he would win without prep time and without being the main character.