For a limited time, Arby's is offering this funky new turkey sub sandwich melt thing. The Turkey Three Cheese and Bacon sandwich comes on a toasted sub roll. It has melted Swiss and cheddar cheese and a Parmesan cheese sauce, plus bacon for good measure.
I found the sandwich appropriately cheesy, but felt the need to add some honey mustard sauce for more flavor. Maybe it was just too much cheese and it needed something else. Perhaps it would have benefited from a spicy mayo or something else for variety.
The sandwich is also limited to certain locations, so don't be surprised if you don't see it on your local menu. But if you do come across it, it might be worth a try.