Hi guys! I had an idea for a Romhack/Fangame, does it sound good?

>60-80 new fossilmon alongside the normal ones
>based around the concept of the sinnoh underground, crawl around a vast cave network mining for treasures
>treasures can range from useful held items to evolutionary items to the fossils that you use to prepare your team
>regular world has fossilmons running rampant around the world that you can't catch through regular means
>starter pokemon is a fossil you must resurrect yourself.

Was gonna make this a new thread but remembered this exists. If you can't tell, I like the sinnoh underground and wish there was a game based around it.