We have a lot of ideas in mind, and the one you mentioned doesn't sound bad at all, we might definitely add it. The game will be quite long with a lot of content, so a progress bar might be worth it.
And don't worry, we swear on our balls that this game isn't getting canceled. It might take us another 10 years to finish it, but we won't cancel it. That's a promise to everyone who has been patiently waiting for the game.