At SXSW London, directors Joe and Anthony Russo announced that the forthcoming film Avengers: Doomsday will serve as the opening act of a newly dubbed “Phase Zero” for the Marvel Cinematic Universe .. The pair emphasized a desire to start fresh, distancing the sequel from the dense multiversal storylines that have dominated Phases 4‑6.

Joe Russo Calls Doomsday a "Start Over From Scratch"

Speaking on the conference panel, Joe Russo told reporters, "We want to make sure everybody feels like this isn’t leaning on anything from the past." He added that the concept of Phase Zero reflects a deliberate move away from the sprawling narrative threads that have characterized the Multiverse Saga. According to the Russo brothers, this reset will let Marvel re‑establish a clear, unified storyline that can carry the franchise through Secret Wars and beyond.

Multiverse Saga’s Fragmented Narrative Sparks Need for Cohesion

The Multiverse Saga, which began with Phase 4 in 2021, has introduced dozens of heroes and alternate realities but has struggled to maintain a single, driving plot. As the source notes, the shift from an anticipated "Avengers:The Kang Dynasty" to the now‑planned "Avengers: Doomsday" illustrates the volatility of recent story plans. Critics argue that the lack of a central antagonist comparable to Thanos has left audiences without a compelling through‑line.

Phase Zero Could Lower the Entry Barrier for Casual Viewers

One of the Russo brothers’ stated goals is to make the MCU more approachable after a period of rapid content expansion. The source points out that the sheer volume of movies and streaming series has created a “intimidating” landscape for newcomers. By positioning Doomsday as a clean entry point, Marvel hopes to win back lapsed fans and attract viewers who felt overwhelmed by the franchise’s recent output.

Doctor Doom’s Potential Role in a Soft Reboot

Speculation abounds that Robert Downey Jr. may appear as Doctor Doom, a character who, in the 2015 Secret Wars comics,reshapes reality after multiversal incursions. If the MCU follows that storyline, Doom could become the catalyst for the Phase Zero reset, effectively rebuilding the universe’s continuity while honoring comic‑book roots.. This possibility aligns with the Russo brothers’ suggestion that Doomsday will lay the groundwork for a new era.

Risks of Abandoning Recent Continuity

While a fresh start offers clear benefits, it also threatens to alienate fans invested in the Multiverse Saga’s newer characters and plot threads. The source warns that discarding recent developments could sever emotional ties and waste narrative groundwork already laid in series like "Loki" and "Ms. Marvel." Moreover, some analysts view the Phase Zero label as a marketing tactic rather than a genuine creative overhaul.

Open Question: How Much of the Multiverse Saga Will Survive?

The biggest uncertainty remains which elements of Phases 4‑6 will be retained in the new framework. Will characters such as Shang‑Chi or Kate Bishop receive prominent roles, or will they be sidelined in favor of a streamlined cast? The Russo brothers have not clarified how much existing continuity will be woven into Phase Zero, leaving fans to speculate on the upcoming narrative balance.