Actually it'd be pretty easy to do a proper removable mask if they wanted too, they can do it like DCD does their COMIC figures, which is where their removable mask setup for comedien came from, difference is the comic figure masks have the eyes in the mask since they have white eyes, like green lantern, and green arrow:
https://www.cooltoyreview.com/DCD_13Deluxe_GreenArrow.asp
You'd just have the blacked out eye and then the painted eyeball in the mask, if they can do them on DCD and make them realistic with white eyes just imagine it with iris painted on and its pretty much the same.
It CAN be done, i just dont know if HT will do it. Even as of late with some of their better figures their accessories have lacked. Generally only the most important bits. I'd expect a comedian with maybe two heads, masked and unmasked, one scarred one not. I mean really you consider it, not scarred masked is basic comedian, scarred unmasked is veitnam post comedian whatever you like.
Im not holding my breath for the wide selection of accessories listed by folks here, and while i dont think its wrong ot suggest them hoping HT sees it, i dont expect HT to includ anywhere near that much stuff with their figures.
Expect more full figure, couple sets of hands, extra head, and one or two basic accessories, rorshach would probably be grapnel gun and journal, maybe a cloth mask, niteowl would be lazer, and a pulled down mask, comedian his guns, that kind of thing, each figure obviously coming with an extra unmasked head but thats about it.