Marvel Comics Universe and Avengers #9 Spoilers follows.
Namor Recruits Powerful Allies For A New Team To Rival The Avengers On Eve Of Avengers #700 / Avengers #10?
The book opens with a a storyline catch-up and creators’ credits page.
The Avengers are confronting Namor…
…due to his and his people’s battle with surface dewellers over a company’s actions that killed Atlanteans.
Atlantis has also been crushed due to the whole Final Host fiasco by a Celestial. Dark times notwithstanding, Namor agrees to turn over his prisoners to Captain America for trail under surface world laws.
However, he…
…killed them while they were in prison and…
…creates a Defenders of the Deep to deal with threats to Earth’s waters!
Next up is Avengers #10 which is also Avengers #700 with…
…several variant covers including this one by David Marquez.