Well lets, excuse that fact that that 100 issues of Ultimate Spider-Man= 1 year is f**king ridiculous.
They're saying that Batman and GL's continuity is still mostly intact. (Except for the stuff that can't happen due to the huge shake ups like no Titans, JSA, or whatever.) That leaves at least 15 years worth of stuff happening in a 5 year period. Knightfall. Zero Hour. 4 and a half Robins. Cataclysm, No Man's Land, Blackest Night (With characters that don't exist in this timeline mind you.) War of Light, etc, etc. You can try to shove it all into a 5 year period, but after awhile, you lose your believability. Yes, this is a world with an alien who can fly, a Guy with a magic ring, and a dude who can move faster than the speed of light, but there's still an air of believability underneath. One fantastic thing does not presuppose that any fantastic thing you pull out of your ass is possible as well. There's just no way all that could have happened in five years. Unless they've seriously trimmed the fat. A lot of stuff will not have happened, and I don't know, Batman had 3 Robins at the same time.
It's Laser cannons on Telekinetic Kung Fu Super Gorillas man. There is such a thing as going too far.