This paper argues for Futural Fabulation as a design research method that treats the not yet as a legitimate domain of inquiry. It develops the claim that speculative outputs can operate as epistemic artefacts of the not yet: designed forms that carry propositions about how near futures might work and that can be documented, revisited, compared, and argued with over time. Building from Hartman’s critical fabulation, Haraway’s speculative fabulation, and wider genealogies in design research, the paper formalises a methodological framework for reading such artefacts and for holding them in relation through an Archive of Futures in Formation. The method matters because speculative design is still too often treated as atmospheric, pedagogic, or illustrative, even when it is doing difficult conceptual and political work. The argument also sharpens the paper’s queer commitment. Queer futurity is not approached here as thematic content added to design research after the fact. It is a methodological pressure on how time, evidence, value, and archival legitimacy are organised. In that sense, Futural Fabulation is queer in the way it refuses straight time, resists closure, and keeps futures available as provisional, contested, and revisitable. The paper outlines a reading protocol for epistemic artefacts, a lightweight epistemic register, and a seven stage archive sequence for submission, indexing, registration, initial reading, annotation over time, comparison, and re entry. Together these components offer a way for speculative design to accumulate knowledge without flattening the openness that makes futures work valuable in the first place.