Looking back to this thread...
Reminds me how utterly, completely underrated Namor was...
If Batman gets prep time, I guess he could make up something. But it better be something that kills him, because even dehydrated, Namor does kick ass...
Namor has been on dehydrating machine, with no contact to water, THREE DAYS STRAIGHT. He hasn't eaten, slept or had any other refreshments. Is he completely useless? No, not at all.
First, Namor breaks the machine by exerting his muscles.
http://img91.imageshack.us/img91/9540/dehydrated13en.gif
Then, a punk shoots him in the chest with machine gun, point blank range. Not a scratch (note, Namor is about dozens of times LESS durable, less fast, less strong then he would be at full power.)
http://img107.imageshack.us/img107/1638/dehydrated21tn.gif
After that, Namor fights the punks. He is owning them, so they need to drop a metal thing that probably weighs tons directly at his head...and guess what?
http://img91.imageshack.us/img91/3677/dehydrated32fk.gif
It didn't knock him out.
http://img107.imageshack.us/img107/378/dehydrated47bt.gif
But if Namor gets prep time too, he wins.