Aokiji soundly defeated Luffy in their first encounter. Luffy had no way around Aokiji's logia-type powers.
Now Luffy's trained his haki skills, he can at least hit him, and it would be interesting to see how the heat generated from Gear Second may work against Aokiji's frozen attacks.
However now Aokiji has resigned from the marines, there doesn't really seem a reason for them to fight.
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Luffy's haki will make no difference to ichigo, never mind goku.
Ichigo's final getsuga tensho cannot even scratch goku.
Goku is massivly hypersonic and has planetbuster+ destructive capacity, therefore can solo the entire HST.
NARUTO because naruto have a great strong nine tails fox while luffy only gear third gear of luffy is enough for tail bomb of naruto and naruto has fast skill and moves and many types of rasengan
hate to bust you minds, but it might be sasuke,only because he has extra add ons luffy does not have, BUT luffy does have the capability to beat him in the imposible odds.
ichigo is a good fighter goku is a good fighter but you know if you look at it goku is stronger so that means goku is going 2 win
(talking Dbz)
Ichigo's power level is about : 6,713,111
Goku's power level is about :11,183,524
Luffy actually both of them because both of them are jackshit at smartness but when it comes to fighting both can go beyond to win.
luffy would most definetly win although looking it up, if luffy did the 1000 degree bazooka, plastic man would not live very long.
Goku wins by blowing up the planet luffy is standing on.
Since there is no Sebastian in Naruto we will never know.
Obviously goku will win. He can defeat all the naruto shippuden characters.