Kidnap a loved one and force him to commit suicide or willingly allow his capture.
Put one of those cool paintings of train underpass in front of a black hole and have him ride into it.
Steal technology from the Watchers and employ it masterfully.
Pie eating contest, autopsy later reveals "cosmic poison," SS ate 152.
Put one of those cool painting of an open door that leads into Galactus' mouth, or eating hole, or whatever it is he uses.
Batman uses hypno ray to convince SS never to return to earth or go kill himself.
Anti-power cosmic Batspray tm..
Batman dies , and dies hard and fast. Howewver, i must say that Merc you give some damn great possibilities for a batman victory. A fake painting of a train underpass over a black hole...That is just brilliant. Or even anti cosmi bat spray, i am sure bats could whip up a brew of that , i'm sure he has the ingrediants in his batcave. You gotta give some more of those...brilliant.
Let me try.
Batman convinces surfer it's time for his prostate exam, video tapes the entire thing, rigs it so that any action from SS will lead to its wide spread intergalactic broadcasting.
Switches his surfboard for a regular surfboad (this doesn't win it for Bats but it sure pisses off SS.)
Convinces Galactus to do it for him.
Waxes the SS's surf board Batsuperslipspray tm. and leads him into an anti-matter asteroid field.
Has O.J. Simpson pay him a visit.
Leaves it to Superman.
Paste stickers to his eyes and convinces him he'll be permanently blind if he takes them off.
Consecutive nuking.
Falsifies income information and tells the IRS that he has never paid taxes (audit leads to heart failure.)
Rigs surf boad with cosmic being trap-o-matic.