I wonder if they will bring back Sapna. Her powerset might be a possible back-up for Doug. I liked Red Lotus, even though he was only in a few issues of the X-titles. Wish he was less stereotypical in terms of powers though. Also, not sure if any of Austen's Eight Immortals were mutants, I just remember the ridiculous guy with the swords for legs. Orientalism is still an issue with Marvel's characters, even if there is multi-media representation (from the Mandarin and a lot of Iron Man, the Ancient One and Iron Fist) but there are a few great/fun exceptions like Yukio in the comics and in The Wolverine.
I wonder if Dr. Droom/Dr. Druid counts as Asian. I thought Psylocke was the first but this is so cringe-y: https://www.cbr.com/doctor-droom-asian-superhero/