Heck with that, let's waste the whole Justice League.
BATMAN: Him first. Despite being the team anal retentive gun grabber control freak psycho, he's apparently the only one with anything resembling an IQ. I've lost count of the times that all the super powered demigods he works with have gotten their butts handed to them by some team of world-crushing supervillains, yet this lone dork with nothing to his name but parental issues and a bat motif fetish managed to bail their butts out.
Considering this whack job has absolutely no superpowers whatsoever, anything from high explosives to a board with a nail thru it would suffice to do the job, depending on the circumstances. But since this mother seems to have more lives than every cat in Catwoman's apartment, I'd be thorough. I'd track the bats around gotham back to the batcave by radio transmitter. Then I'd plant explosives, poison gas, poisoned barbs, cut the brakelines on the batmobile (and load IT down with explosives), rig automated machine guns to strafe the batcave from top to bottom, infect all his bats with rabies, booby trap all his bat equipment, plant spikes at the bottom of that bat-pole-- then go upstairs and booby trap everything in wayne manor.
Then when he drove home I'd push the button and blow everything to kingdom come.
And if he somehow survived being shot, gassed, stabbed, bat-bitten, poisoned and blowed up, I'd sit and wait at the waynetech offices and shoot him in the face with an exploding, armor piercing bullet coated with three different instantly fatal neurotoxins and the AIDS virus.
There. That oughta do it.
Or I could just talk the Joker into playing a new game called "Palestinian Bomber." We gut him, stuff him full of C-4, and when Batman shows up to stop his latest goofy-ass plan, we push the plunger.
Wheee, bat kibble.
SUPERMAN: Machine Gun filled with kryptonite bullets. "Ha, what are you, mental? Everyone knows I'm bulletprooAARRRrrrrghhllleee."
Let's make it gold-plated bullets so that crapweasel Green Lantern can't save him, either.
GREEN LANTERN: Empty the last of the gold-plated bullets in his face while he's screaming "You killed superman you bastARRRGHggle."
WONDER WOMAN: Nifty trick with the bullet-deflecting bracelets. Ever reflect that they'd be fricking useless against a shotgun? Or better yet, a half dozen shotguns? Next slide, please.
MARTIAN MANHUNTER: Oh really. I mean, how scary is a guy who's floored by a cigarette lighter? Yeah, he can do psionic mind tricks and crap. One tinfoil hat and a flamethrower and it's "mopup on aisle seven please."
PLASTIC MAN: Say hello to plastic solvent.
THE FLASH: Grease his shoes with silicon lubricant. Picture him slamming into a concrete wall at mach 7. Ouch.
HAWKGIRL: What, HawkMAN too non PC to rate? Great, a PC Grrrl powered halfassed sidekick of a halfassed superhero. And again, a one-trick pony. Flying, and waving around a hi-tech battle mace. Crap, give me a flying belt and a magic bilylclub and I'd rate just as good. Either shoot her or poison her birdseed, I don't care which.
GREEN ARROW: What is this--- being able to use a stone-age weapon qualifies you to fight crime? That this obnoxious loopy socialist horndog dork is still alive is testimony to nothing but the poor aim of every clown he's busted. "Look, I can shoot a bow and arrow!"
Look, I can shoot a grenade launcher! *BOOOM*.
See you pull a trick arrow out to deal with THAT, suckah.
AQUAMAN: Dump some chlorine in his fishtank and he's a goner. Or pour a truckload of that dessicant powder --- you know that stuff that comes in little packets in shoes that says "do not eat"?--- on him. Change his name to Dried Kipper Man.
Feh. Good riddance. These characters used to be heroes. Now they're nothing but shills for the gun grabbers, hairy-legged manhaters, America bashers and blubbering wet sops of the Left who have overrun our society's culture and media. They're about as socially relevant as Cher.
A pox on their writers, and their families.