I think that 128gb 12 pro 6,1” will be sweet spot for many if they want to upgrade in few years so...
12 pro > 12 > 12 max > 12 pro max
Personally I think it’ll be the standard 6.1” 12 that is the sweet spot in the range at £749. Undoubtedly the 5.4” will be in huge demand but those wanting a bigger phone aren’t needing to spend £1k+ with what is rumoured.