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The Master Defenders Universe', or MDU, is the name given to the shared continuity existing between the Master Defenders Novels/ Novella's and the Comics-based animated series (that is in pre-preproduction).

This continuity is also sometimes referred to as Dimension 8 (Due to that is the Dimension that the continuity's most consistent creative influence resides) and the New Dimension 9 (created as an alternate reality).