The dev behind Cosmic Star Heroine has been interested in bringing the game to Switch for some time now, but it appears he's had a hard time getting Nintendo to discuss the idea. Thankfully those days seem to be over, as another party has stepped in to make the port happen. Dev Robert Boyd explained the situation to USGamer.
"A contractor contacted us about doing a port [of Cosmic Star Heroine] and publishing on the Switch and their terms were quite favorable. Nothing signed yet, but I'm optimistic."