Yes he can, there are a few big differences between One Piece and Naruto/DB
once Kishimoto ran out of elements to (ekhm) borrow from Togashi Naruto became less focused on set-up, he managed OK until the Pain arc but after he started to just pull stuff out of his a?? (like Kaguya), the one thing Naruto still has is Naruto v Sasuke so Kishi should stop f????g around and fix his manga
Toriyama also had absolutely no idea how to proceed since he wanted to end DB so he made up stuff as he went
on the other hand at this point One Piece has enough material for another decade of story telling even if OP was't initially planed to last this long, major plot-lines that were here for volumes:
- the Yonko (introduced in volume 45, of that Shanks in chapter 1 and BB in volume (I think) 34)
- Dragon and the revs (chapter 100)
- the Marines (introduced all throughout the series)
- the WG
- there's also the ancient weapons (Alabasta)
- the Final war
- Mihawk
and a LOT more story-lines that can easily fill 400 chapters without any a??pulls, even more these are the stories we all want, the most epic of the bunch, the best of OP is still to come
PS: don't let anyone ever tell you that set up is bad, for the story it's much better than action
PPS if anyone can manage a story like this it's Oda and Togashi, they are the geniuses (among some others) of this generation, just ask Tsugumi Ohba/Takeshi Obata if you don't believe me
