You're going to need to prove otherwise then.
Question the Definition of “Canon”
What exactly is your definition of 'Canon'? In Marvel Comics, the term 'Canon' is not rigidly defined by a single author or storyline. Marvel Multiverse operates on the concept of countless parallel universes and timelines, including Earth-616 (the main continuity) and infinite other realities. Saying something isn’t Canon requires clear criteria, which Marvel itself often leaves ambiguous.
Point Out DeMatteis’ Official Marvel Publications
J.M. DeMatteis’ works have been officially published by Marvel Comics, including stories that introduced concepts like The Far Shore and The White Hot Room. These ideas have expanded the Marvel Universe in significant ways. Claiming his works aren’t Canon disregards the fact that Marvel itself approved and published these stories as part of its universe.
Highlight His Contribution to Marvel Cosmology
J.M. DeMatteis played a pivotal role in expanding Marvel Cosmology, particularly in exploring philosophical and higher dimensional concepts. For instance, The Far Shore is described as a realm beyond all dimensions, a place that even beings like Eternity and Infinity acknowledge as superior. Dismissing these contributions undermines the depth they bring to Marvel narrative structure.
Use Examples from Marvel Supporting DeMatteis’ Ideas
Looking closely, DeMatteis’ ideas have been referenced by other Marvel writers, such as Jonathan Hickman and Al Ewing. For example, The House of Ideas was prominently featured in Immortal Hulk and described as the source of everything in the Marvel Universe. The fact that other authors incorporate these concepts proves their significance and validity as part of Canon.
Conclude with Suggestions
Therefore, saying J.M. DeMatteis’ works aren’t Canon appears to be a subjective judgment rather than an evidence-based conclusion. If you want to refute their importance, you need concrete evidence that Marvel officially disregards them as Canon. However, based on existing material, DeMatteis’ works are integral to Marvel Cosmology and add substantial depth to the Marvel Universe.
Marvel Handbooks and Official Guides
Many concepts introduced by J.M. DeMatteis have been cited in official Marvel Handbooks and guides, reinforcing their status as part of the canon, at least within the context of the Multiverse.
"Referenced in Mainstream Storylines"
"Doctor Strange: Into Shamballa has been acknowledged as part of Doctor Strange history."
The Far Shore and the “Realm Beyond Dimensions” have been continuously utilized in Marvel broader Cosmology.
Editorial and Creative Intent
While Marvel has not directly stated that “everything” J.M. wrote is Canon, Marvel’s policy generally does not involve outright erasing Multiverse content. Officially published concepts remain canon unless explicitly retconned or removed, which has not happened with J.M. DeMatteis’ contributions.