Collection: What If MOC Building Sets | Compatible with LEGO Bricks

Explore the multiverse like never before with our What If MOC Building Sets, fully compatible with LEGO bricks. Inspired by the hit Marvel series, these custom sets reimagine iconic characters in alternate realities—from Captain Carter to Zombie Iron Man. Designed for collectors, superhero fans, and creative builders, each kit captures unique what-if scenarios in brick form.

Inspired by Marvel’s What If...? Universe

Each building set is based on alternate universe storylines from Marvel's What If...? animated series. These MOCs bring to life fan-favorite episodes, such as Captain Carter’s rise or Doctor Strange’s dark descent. Designed for LEGO-compatible collectors and Marvel fans, these builds are as imaginative as they are collectible.

100% LEGO-Compatible Pieces for Seamless Building

Our What If MOC kits use fully LEGO-compatible bricks, allowing for smooth integration with your existing LEGO or MOC sets. Build confidently with high-quality ABS plastic that snaps together just like LEGO. Perfect for creative builders who love to mix, customize, and expand their collections.

Unique Gift for Marvel and LEGO Enthusiasts

Looking for a unique superhero-themed gift? These What If building sets are perfect for Marvel fans, collectors, and LEGO lovers. With striking character designs and alternate-universe twists, these sets make memorable birthday, holiday, or collector's gifts for anyone who enjoys creative play with a superhero edge.

Highly Detailed Custom Minifigs & Scenes

Each set includes exclusive MOC-style minifigures and brick-built scenes, offering intricate details not found in standard LEGO sets. From Zombie Captain America to Star-Lord T’Challa, these kits deliver a premium display experience while remaining fun and satisfying to build.

Rare & Collectible Brick Sets for Superhero Fans

Unlike mass-market LEGO releases, these What If MOC kits are custom-designed and harder to find, making them ideal for collectors seeking something different. Each set offers a fresh take on the Marvel universe—perfect for those who want to build the multiverse one brick at a time.