Hydroman vs. Sandman
I didn't bother searching to see if this was done before. Humor me, I'm trying to be original. Just a tad tired of seeing Wolverine/Spiderman/Thing/Batman/Superman/Hulk/Juggernaut/etc. in every thread.
Neither seem capable of being harmed by purely physical means. But perhaps they're opposite abilities will have some sort of weakness or strength against the other. What's the general opinion?
They fight in Central Park. There's a medium-sized pond and plenty of sand. They don't have anything they don't normally have. They're both at their peak of power, whatever that happens to be.