Just like the title suggests, what would happen exactly? And I'm talking about Post Naruto:The Last with all his God like planet busting powerz :P
Would he just raise all sorts of hell in a pranking spree?
Your signature is gonna get you infracted so hard.
There's a size limit you know!
But probably the same thing like if Goku suddenly popped up, just help defend the planet I'd imagine while trying to find a way home?
Secondly, Aaaaand what would happen if persay a really stupid overzealous Night Elf *Cough*Malfurion*Cough* tried to kill him by sensing Kurama and the other bijuu inside him?
Probably one of those type of misunderstanding fights I'd imagine? Like, no one would get killed, but he'd defend himself and then explain the truth to them?
Naruto can pop a Tree and Malfurion would just praise it.
He'd get killed in an instant, by... I dunno... Anduin or Basic Campfire.
10 year escort quest to find Sasuke.
The universe would descend in to a deep, bitter darkness with no hope of ever escaping. It would be called The Great Recalling, which is just a way of saying that everything and everyone will be stuck in a flashback of a flashback of a flashback of an ability explanation flashback.
but seriously, he'd just try to find a way back home, the bronze dragons would probably be very interested in him.
sensing kurama shouldn't really do anything to make anyone mad, he's not a fel demon or even a true demon. he's just a spirit. if kurama and naruto ever get fel corrupted, there could be trouble. i'm pretty sure naruto's faster than anything ever faced in warcraft, even if he's not as strong as some of them. speed + power = a very bad day in warcraft.
Warcraft uniwerse would get even worse than it is.
The animation definitely got better as things went on, but you could tell when something huge wasn't happening as they used less talented animators. Even when the animation was great, like Pain vs. Naruto, the direction was quite absurd what with Pain going all Sonic the Hedgehog or that scene where he goes so fast his face contorts into a cone head. Don't get me wrong, the fight was amazingly animated, but man did it look silly.
Naruto filler is some of the worst I have ever seen. It isn't as bad as Bleach's, as it does connect some story from time to time, but it is some of the most boring stuff I have seen. The only one I can say was good was the 6 episode filler called Power, or something like that, it had great animation, oddly, and seemed like a movie. The rest is so incredibly boring that it becomes unwatchable during that entire time. Take for instance all of the filler that litters the War arc, where it barely connects to anything and is just all about "what if an old character tried fighting the same character again" and the good guy wins unsurprisingly, or the one where that kid also has 9-Tailed Fox powers for no reason. Filler should not be 20-40+ episodes. Hell, let's not forget the episode where Orochimaru walks down a bridge before he fights Naruto, something that could have been 6 minutes took an entire episode, you do not extend an episode to create more suspense for something that already has it. Dragonball did that multiple times and no one liked it then either. Bleach's filler was worse though, as has some of the longest filler out there and the worst in almost every other way, but we also have another titan of Shonen, One Piece, where filler there has only lasted between 4-~10 episodes.
I enjoy Naruto, when it wasn't being completely stupid, but in no way is Naruto the best since Dragonball. The show opened up spectacularly, showed how the characters felt, even the villains (which became the mos popular ones in the series), and everything was a lot more fleshed out, but as time went on things just went down hill. Sure there were some great moment afterwards, but it never really could match the first arc.