Apparently, one of the Key Animators at Pierriot made a concept art sketch or was involved in the idea of having a crossover episode special between Naruto characters and Bleach characters!
Here you can see Naruto using Rasen Shuriken as well as Ichigo and Rukia in their pre-fullbringer arc uniforms in the Konoha Leaf Village. You can also see others with guns and such which is crazy!
Can you imagine, freaking AIZEN & MADARA teaming up! bruhhhhhhh, let me stop.
Anyways you can see the concept art sketch below! This definitely would’ve been something cool to remember.