Just to add to the topic, don't you think that Imperial Japanese imagery would work well for a game like this being released in Japan? It makes sense for that to be added, and you can have a kamikaze worm or something in the foreground. Also, you can call Japanese Worms Armageddon "Worms 2," as Worms 2 was never released in Japan, and Worms Armageddon is basically an updated Worms 2.