Didn't they have him using a lightsaber as well? They had a character called The Black Knight wearing a brown leather jacket and using a lightsaber. Ugh.
I'm torn. On one hand getting Black Knight would be awesome. The problem is this is the Marvel Cinematic Universe.
I can already see a bunch of people trying to tone down the costume.
They would then get him to use a lightsaber instead of the Ebony Blade.
They would do away with the helmet because the MCU hates helmets. If you are paying for actors you have to get your money's worth.
They would do away with the flying horse because it's a flying horse, but to be fair there is a comic book reason why Dane doesn't have a flying horse.
They took Hawkeye and turned him into a boring dude who lived on a farm with a family. I shudder to think what they would do to Black Knight.