When MK toured with Clapton in the late '80s, it was very much a Clapton show, even though there were a lot of Mark fans in the audience.
MK pretty much stayed in the background, though he and Clapton jammed a bit or answered each other musically during songs.
Mark did a couple of his songs, but it was mostly Clapton.
I would guess this tour will be mostly about Bob, with Mark as a guitar player.
Just my thought.