I'm going to have to check your geek credentials after a comment like that! Dragonball Z teamwork consisted "let me fight him one on one!" "okay!" (or possibly of Krillin exploding to buff Goku).
Heh. Yeah, saying something like "Lets all attack him together!" on that show roughly translated to "We're all useless anyway, so lets hurry up and have the bad guy kill 12 of us by the end of the episode so we can spend the next 27 episodes on the real fight.
Of course, Dragonball was the trendsetter, so it's allowed to be horribly cliche. The overall trend since then seems to be having all the minor characters fight each other and then letting the hero beat up the "boss" villian. (Which still isn't teamwork really. It's just not neglecting 3/4ths of your characters. )
Eh, Back to D&D. I agree that it's easy to find simularities if you're an anime fan, but I think the overall change is leaning more towards cinematic in general, including comic books and movies and even novels. More cinematic+more tactical seems like a huge win to me.