Also, with the new digital screens, different touring setups would be more versatile than in the past. So you could conceivably theme 2028 to be strictly new album tour, and then 2029 to be something else entirely. All you'd need is a decent window of time allotted for the animators to do a new big Eddie, a few setpiece songs a la Hallowed and Rime, and then a mess of barely animated ones for the "static backdrop" songs, if RFYL is the template for the stage set going forward.
That said, I too think it's weird Bruce said plans up until 2028, since Maiden haven't compressed a full tour into a single year for a good while now. But, since history tours appear to be more profitable than album tours, it could make sense to try to pack an album's touring cycle into a single year instead, and then follow it up with a year of hits.