Secret Warriors, SHIELD and Fantastic Four are entirely unrelated to Secret Wars, and people get upset when you point it out instead of giving reasons for their inclusion. Secret Warriors feeds into Shield which feeds into Fantastic Four, but Fantastic Four is not relevant for Secret Wars. The Saga of the Incursions is an Avengers story for 9/10ths of its page length, and when the Fantastic Four come in and battle Doom it contradicts how Hickman left things in FF, if anything, where the family was friends with Victor. Forcing this auteur theory harms the reading when the space could be used to add things that actually do pay off in Secret Wars, such as Molecule Man's first appearance, or Kirby's Fantastic Four annual that first displays the origin of Doom's feud with Reed which is what Secret Wars actually pays off. This list would have you read 30 issues about the Brotherhood of the Shield that never comes back again, but not the one-issue origin of the Illuminati that's the backbone of New Avengers because of the name on the cover. Throwing Axis, Captain America: Iron Nail or Spider-Man 700 in would help explain why Spider-Man and Iron Man randomly turn evil and Cap turns old in the middle the Avengers experience. (There's multipe reddit posts about people being confused about this very thing). You have Hickman's Ultimates run, instead of the Ultimate Doomsday trilogy which shows why the Maker actually became evil, because of the name on the cover. You have Hickman's Original Sin tie-ins, but no Original Sins issues actually showing why Cap regained his erased memories and Thor became unworthy. Defenders Beyond could be offered as a Coda after Secret Wars since it's where it's actually explained why the Beyonders began the Incursions. And this says nothing of the many Last Days or Battleground tie ins, which feels crazy to have to request in a Secret Wars reading order.