The Leatherman Arc would be a tool based off the Free series framework with upgrades. The Arc would feature a heavily upgraded blade from the one currently used on the Free series. Leatherman uses 420HC for it's blades with the exception of the Charge series. The Arc would feature a new blade made of CPM Mangnacut. The benefits of Mangnacut are high toughness, high wear resistance, and high corrosion resistance. The steel would behave a lot like S30V but would have insane corrosion resistance; great for when you have to be in a humid environment or at sea. This tool having Mangnacut would be an amazing upgrade but considering the current high demand for this steel it might be hard for Leatherman to secure enough.
The tool is claimed to have a DLC coating on it. What is DLC? "Diamond like carbon", also known as DLC in short, is a coating applied to the surface using a multi-stage high-tech process that measures only a few micrometers. In the process, the surface is vaporized with a diamond-like carbon to create an incomparable surface hardness and a deep black appearance." All that in short means it would allow the tool to take years of abuse and still look great.
In this photo you can see the possible tool layout:
I feel the DLC and Mangnacut make this project pretty far fetched if not expensive. However you never know what Leatherman has up it's sleeve.