I don't expect to be out next year because the game isn't written in Ren'py, Fen wrote it in a word doc. "Translating" it into Renpy will probably take 1-2 months just that (because of its size).
Then, there is all the scripting. For such a big game, that's another 2-3 months.
Then, at last, the RPG design. Rules, gameplay, inventory. If I was using Loren/SOTW framework MAYBE I could get it done in 5-6 months. But I'd prefer to use the new framework Anima is working on, since has support for ammo and other stuff (in current one I should hack it).
So we would be already around October/November next year, assuming there are ZERO PROBLEMS (all the romance CG are to be done, and some art, the full soundtrack as well, etc). And all of this doesn't include testing
If I was like some devs that just use RPGMaker, reskin the art, and keep same rules, would be easier for sure
