Like I said before a while ago Tsuna can move at nearly the speed of light in his full power thus overpowering the assassin girl burning hawk eyes arrows as well Thor's power is lighting thus Natsu could eat his attacks and recharge then take give him lighting fire dragon punch. Thor would be surprised Ichigo getsugatenshos all Iron man and we know he can cut through steel so he can easily cut through Iron even if he's in shikai and don't forget Bankai. Luffy punches can easily take down the captain and if your worrying about him blocking with his shield gear 2 behind him and break his back naruto confuses the hulk with his shadow clones and if he has to sage mode will equal there physical strength and rasenga the hell out of him. Then if Iron man is still alive Naruto can go into bijuu mode in which his rasengan is a bijuu bomb and destroy his armour and then Ichigo can use this chance and getsugatenshos him. And then Goku can kill the x men alone with a Kamehameha end of discussion.