I don't think what DB said was a joke, because why would they have a new opening and ending of the "new" Naruto(as in the storyline Naruto) starting on episode 179 if the fillers are still going to air in April and if what Assertn said was true about Naruto returning to the original storyline in May? Which is why I think that the new opening and ending will be an opening and ending for a new season of fillers.