User blog comment:Xilinoc/Ch. 592 - Marching Out the ZOMBIES 3/@comment-11446176-20140806073523/@comment-5398287-20140807060949

Alright, look, this is starting to drag on a little long, so let me try to wrap it up.

At this point in time, we don't know if Engetsu is a fire-type Zanpakuto; however, there is evidence pointing to the contrary, primarily Isshin being able to use Getsuga Tensho, which is not related to fire and which he knew before Ichigo was even conceived (see Everything But the Rain where he confronts Masaki's inner Hollow). On top of that, most known fire-types actually do not have a release command related to fire or burning (Snap, Crush Down, Sever), and there are Zanpakuto whose release command is related strictly to appearance (Reap, Kazeshini). Point is, a release command does not automatically confirm the type of the Zanpakuto.

As far as a matchup goes, I'm interested in Isshin vs. Hitsugaya purely because of their former connection as captain and third seat; to me, the best fights with brainwashed (or in this case, zombified) characters are not those with characters who have a good power matchup, but those who have fairly deep connections to the brainwashed character in question.