Some spoilers from her comments on her VK page, it looks like she is doing a Karlach cosplay next month. She is also planning on doing the white haired Shadowheart version, and also Navia from Genshin I think(these characters probably not next month I would guess).
On a personal note I would like to see her do a cosplay of Eve from Stellar Blade and Yuzuriha from Hells Paradise. I was surprised she didn't do Yuzuriha already, and Stellar Blade is quite new, but both characters would fit her perfectly. Any recent new characters you guys would like to see her cosplay?