"Some one he never faced before...thats...why...he...is...using ......prep...time...
"Namor will have no clue about batman and will underestimate him."
That logic its turned around. Prep time only works when you know your opponent. They never met before. For you to say that Batman will know something for him to prepare, they must have an encounter before this one. Wich means Namor will know with whom is he dealing also. Or is this one sided eh.
It works both ways, and because it does, my money is on the guy who is more powerful even at its weakest.