Mothpete

You want setup for Avengers: Doomsday? Ok: The concept on incursions, and that a single person can cause them, was setup in Doctor Strange in the Multiverse of Madness. But you didn’t watch that. The rules of the Multiverse and variants was setup in Loki. But you didn’t watch that. The concept of a person being in a universe where they don’t belong (which can cause an incursion and is very, very important to the plot of Doomsday) was setup in The Marvels. But you didn’t watch that. The X-Men being heroes defending their universe and seeing those from a different universe as a threat was setup in Captain America: Brave New World. But you didn’t watch that. Latveria and Doom being from Earth 828 was setup in Fantastic Four: First Steps. But you didn’t watch that. The Multiverse crisis becoming so bad that Earth 616 is aware of it as something happening in outer space was setup in Thunderbolts*. But you didn’t watch that. There was a lot of setup for Avengers: Doomsday. But you didn’t watch it.