Don’t think the Butcher suit is arriving now unfortunately.
To be honest it would have made sense to have this arrive as part of the ‘Deluxe Edition’ content as that focused on the nostalgia suits from the previous Hitman games. As the Butcher suit was designed around ‘A Meat Kings Party’ from Hitman: Contracts, it wouldn’t make sense to randomly drop it now in my opinion.
I think it will appear at some point as an unlockable, why waste a good suit, especially when fan response has been really good for it. Same with other leaked suits.
Perhaps with the Elusive Target arcade they will use that as an excuse to provide some new unlocks including the suit.
Now that we know that there are new locations coming, they might find a way to shoehorn the suit into a new location on an NPC as a disguise or something.
Already got and wearing it 
