I might have Mareep, Litwick, Heracross, Aron, Murkrow and Aerodactyl, I'll be available in around 10 hours from now, let me know in case you already find someone else to help you out.
That's a lot of water pokèmons right there. I wouldn't mind a tentacool though, here's my list of breedjects (they are all at least 4 perfect IVs, some might have even 5 with egg moves that I don't even remember):
To be fair, this isn't about when it's going to be ready though. This is about "is this thing still being worked on?".
I would play the new episode independently on when it comes out, be it tomorrow or in 2019. It's just that if he really stopped working on the game, it would be cool to know, nothing more (I think this is what Dave meant at least).
I don't have any clue myself, but I recall Marcello saying something on discord about the public version meant to be released prior to that date (I'm assuming you also thought that "A community-wide Spoiler Lock is in effect for Reborn's Episode 17 until 1/1/18." meant the public version was supposed to be release around that time). Considering the amount of bugs there's a chance it'll be released even later than that date, but that's just what I have been told.