Well, a new report indicates why he'll enter the picture, and it's all due to Steve Rogers himself. First, Daniel Richtman revealed that Victor Von Doom will hunt down everyone who has caused an incursion, which is the clash between two or more different universes. Scooper MyTimeToShineHello has now unveiled that the incursion that killed Doom's family was caused by Steve Rogers going back in time to live with Peggy Carter. For starters, we need to address two concepts that have gained relevance since the start of Phase 4: branched timelines and the multiverse. That's why Kang went to such extreme lengths to ensure that branched timelines weren't really a thing in the MCU.