@Ancient_0f_Days: wrong, blacks only make up 14% of the population (might be off a percentage or two), whites are still the largest ethnicity in the U.S. by far. Im 90% certain that over 50% of americans are still white.
@TheCannon: Just to be clear the 24 hours prep is only prior to the start of the guantlet, since he only gets five minutes between each round?
If so he would only have a day to gather all intelligence on all 13 villains who he knows nothing about and then form individual plans for each and every one of them. If that is the case, i think its a stretch for everyone to say he just clears it. To all the people claiming he is clearing, short of breaking out things like the insider suit or JLA robots (which would ruin the challenge and point of this) i think batman would seriously struggle to come up with sufficiently comprehensive enough plans for each villain in such a short time frame.
I can honestly see him having trouble with everyone post round 5 (excluding scorpion) and especially the likes of electro, carnage, and doc ock with one hour prep.
Edit: (meant scorpion and electro not lizard and shocker) also if lizard is post-shed that makes it worse for batman and also with only five minutes of rest between rounds that once the fights start to drag on, batman is going to become more and more fatigued and more likely to be injured.