Mapping-wise, I'm doing the 4th town/city. I still need to make indoor maps for the 3rd, though.
I've done the events for the very start of the game; around half the routes so far have their trainers done, but are otherwise devoid of NPCs, which I will fix. The towns, other than the starting town, also need NPCs.
The major barrier to a release, though, is spriting. I'm doing OK with Pokémon front sprites, but I haven't done many back sprites yet. Also, switching over to the new OW style will take a while.
Finally, I need to sort out the rest of the menus to match the battle menus in terms of appearance and functionality. This is also going to take quite long, as there's quite a lot of menus to do... Load menu, Start menu, Pokédex, Pokémon menu, Items menu, PokéComm menu (similar to the Pokénav), Option menu... At least I thought to make a separate class for the buttons which can be used in all of them (includes stuff like fading out unselected ones and lighting up when you press C).