Possibly yes.
Are you planning on adding the IMAX scenes in 1.43:1 as well and with a common width (vertical expansion for the IMAX scenes)?
Yes. Once I’m finished with color correction for the whole film, I’ll make a new timeline with adjusted resolution to allow for the IMAX scenes at a width 1920 pixels and swap all the 16:9 shots with the true IMAX aspect ratio shots.