https://github.com/GloriousEggroll/ULWGL
From the github:
WHAT DOES THIS MEAN FOR OTHER LAUNCHERS (lutris/bottles/heroic/legendary,etc):
- everyone can use + contribute to the same protonfixes, no more managing individual install scripts per launcher
- everyone can run their games through proton just like a native steam game
- no steam or steam binaries required
- a unified online database of game fixes (protonfixes)
It really depends whether he got the devs of "Lutris, Heroic, Legendary, Bottles, etc." to agree to use the unified runtime before starting this project. As long as he gets most of the big players to join then it will actually become the only standard worth using.
Based on the currently Bottles dev's plans to create Bottles Next, my guess is no
Why would that effect whether or not they would use it?