Yet to be confirmed. You can find various discussions/talks about the subject in several posts, like S6 GC Final restrospective that suggest the general direction the process probably will take.
What seems to be a rule of thumb for S7, is that the metric/s that any MR use, will need to be the following (i suppose either one or several of these):
- Increase Superchain TVL
- Increase Stablecoin TVL across the Superchain
- Increase Wrapped Asset TVL across the Superchain
- Increase Bridged Asset TVL across the Superchain