The anime was probably costing them too much so they ended it. Cuz if you think about it, trying to create the anime, pay the creators, find time to put it on T.V., pay the T.V. People for it, and pay the voice actors would cost a lot of money...
You know that is an interesting idea and it does make sense.Because that would have basically made him an arrancar which would explain why he was able to manifest a zanpakutō without needing a asauchi.
Because it wasn't a soul reaper zanpakutō it was an arrancar zanpakutō which would explain why when he used his bankai his inner hollow tried to take over because his bankai was also like an arrancar's resurrección which awakened and strengthened his inner hollow.Because if you notice unlike Shinji and the other Visards Ichigo can only release his mask when he is in his bankai state.The only time he is seen wearing his mask when he isn't in bankai is when he regains his powers after Byakuya takes them.
actually ichigo can use his mask without his bankai [link] but he seems to use mask as last resort to overpower a stronger enemy
and i dont know i think that his zanpaktou is actually a arrancar/shinigami hybrid one because after he lost rukias powers and awakends his own he gave birth to zangetsu but also the inner hollow powers that were slepping within him awakend and merged togheter with zangestu as you can see here [link] they say that they originaly were one
Yeah I remember that just like when he was training to control his hollow powers his inner hollow said that he and zangetsu were one in the same but who Ichigo saw depended on which had the greater power.