ok guys i have a theory about hell so far the only time we have seen it is when that hallow was dragged away by that big dude with the sword. but i have a guess that it will be brought back soon. i think maybe aizen had ties to hell some how i mean aizen let his army go a little to easy if u ask me. i know he is ubber strong but at the same time he is ubber smart and would not mix it up with the soul king with out a back up plan like an alliance with hell. IDK what do u guys think how can hell be brought back. an ideas and theory's on the subject are welcome.