I haven't read it yet, but Newsarama's advance review of "The List" states:

After members of his Dark X-Men group go rogue, Norman Osborn decides to send a message to the Atlanteans in the form of a genetically modified Plodex with some very personal ties to Namor, the Sub-Mariner. Unfortunately for Norman Osborn, Namor has the power of the X-Men on his side and he does not intend to go down without a fight.