im on the trio side, luffy have a rubber body, so he can stretch it and he has uber speed, and as much as i know, Kyubi naruto (a ninja with a demon fox inside him, nature regen) can shoot this ball destroy a moutain, and make clones of himself, lots of them.

so my theory is: yes, goku can destroy a planet in an instant, he can teleport, but the ki balls, beams, travel at quite slow speed. so ichigo and luffy can dodge them quite easily, if you doesn't count those ninja substitution jutsu thing, Naruto can alway regen himself, real fast.

that's for the defensive, now offensive,

Ichigo speed should be able to keep up with goku, and he can poke, and distract him, while i know sword doesn't work on goku since he block trunk sword with one finger (although trunk sword is a piece of chocolate -.- ) while Luffy can sling shot naruto (+ accuracy and damage) , mean while naruto make the rasengan ball thing, and clone hundreds of him, barrage Goku with it.

he must be defeated eventually, since naruto power seemed-to-be unlimited