Unlikely to ever happen due to Trust balancing. It's easy to scale Trust damage up or down depending on player output. But there's only so far down you can scale them before they're hitting for 1s while you pump out your full rotation. Adding in even a second player to that massively unbalances the scaling.

Additional troubles arise in terms of player deaths. Solo player dies with Trust, immediate release. Adding a second player means recovering from death in a way Trusts aren't even programed for.

There are more problems as well, which all lead to the simple conclusion of it'll never happen without being more work than it's worth.