ultimately though, i do wonder how they'd implement kasumi if she were put in
do you package her in retroactively with joker, or do you sell her separately and give people the chance to get a slightly altered joker for a smaller price than challenger pack 1? my thinking is the former, because at least then challenger pack 1 becomes an even more enticing prospect than potentially sabotaging sales from people who just want the basic joker fighter (give or take a few echo tweaks) and so go for kasumi instead.
a few people on reddit (and also me here) have speculated that her persona will be josephine balsamo, aka. countess cagliostro - arsene's lover/rival. countess sort of fits the same vibe as thief codenames like 'queen', so i don't think it's impossible.