Spec Check

With all of the information that is currently available in comic speculation, it's really important that collectors cross-reference any news that is put out there.  I don't read or listen to many other comic speculation sites or podcasts but I am a fan of Jim Comics as he is an advocate for reading the books.  In his most recent video that was put out, however, he spoke about the importance of Powers of X 4 and Marvel 1000 in conjunction with the appearance of Apocalypse's first Horsemen.  

 Powers of X 4

Marvel 1000

While I can definitely advocate having both those books in your collection for different spec reasons, note that the Horseman actually appeared in House of X 2 (already a key in establishment of the new Hickman status quo) with one of them even appearing in the top right corner cover.  

 That book was released on August 7th, 2019 predating all other appearances.  If these Horsemen are going to play a big part in Hickman's plan for Apocalypse(who will be appearing in Excalibur down the road) this would more likely be the book to seek out.