To me the wording is like a wish to continue when 2028 is mentioned. Yeah, the plans may not be decided yet, but we know they prepare tours in advance, so 2028 should be on their minds (plus studio plans). Maybe Dave (or Janick) needs a year off to continue (let's hope no more changes), they've all committed to this tour without Nicko and it's a long one because of the break and the anniv. As I said, until 2030 is the goal for the old bands, so a new album plus a 3-years leg tour is possible. Maybe as the final one, Dave said they still sound good live, but they'll know when it's time to retire everyone. Let's not forget that. More breaks doesn't make sense, even this next year is a surprise for them.
Rod also added: ''Plus there’s some true epics including Rime of the Ancient Mariner and Seventh Son Of A Seventh Son, which will be even more special because these shows will be at the very end of The Run For Your Lives Tour, and so the final time the band will ever be playing a number of these songs'' -> the final time they will play some of these songs live, sounds like another hint for at least one more tour.