I have a friend that took a look at the tweets and translated for me, but he want me to warn you that he's not well versed in Capcom franchise tho.
Katt, SonSon, Tao (Mai-Ling): we had staff users from the beginning, but they ended up being cut because they were all low priority
Arieta: seems like we'd be in trouble ratings wise
Rogue: same as above
Tabatha (Tessa): I was personally pushing for her, I wanted her to fight Dr. Strange
Ingrid: you again!
a grown-up Anita: Isn't this a little too hardcore? We don't know how she should move (not really sure, I'm lacking a lot of context bc i know nothing about these characters)
Final tweet: We had 150 female characters on the shortlist, but none of them end up making it...Oh, Nina was one of the finalists, though.
Fou-Lu: more than popular enough domestically, and he has a lot of cool things to work with (energy sword, dragon servants, dragon forms), but would have been too much work, and isn't very popular overseas, so he was cut
Oh, and Gill almost made it. He was switched with Nemesis last second