Well above zero. What's currently being discussed for the next regulation change is precisely the return of the 2.4L naturally aspirated V8 and a reduction in electrification to around 220 kWh.
I would say that it's quite plausible that this will actually happen. A simpler, less complex, cheaper engine with less dependence on electricity and no turbo, running entirely on sustainable fuel. If the current engine proves to be bad, there will be a lot of pressure to introduce this new regulation before 2031.

