I think this is a Choose-Your-Own-Adventure type of thing. Why not? We've had forum members put together some beautiful denim suit looks recently! If you're curious to try the look, it's an inexpensive experiment, if you have vintage and thrift stores in your neighborhood, and some patience.
I currently own three pieces of denim altogether, so I'm seeking my adventures elsewhere. But if the right long sweeping denim jacket and some flares or bootcuts came my way, I'd pounce. I have some vague idea of Italian style, a sort of Dolce & Gabbana look, with lots of ornate accessories, or some velvet or jacquard textures.