New archival evidence

Absolutely: the document must first be authenticated and evaluated.

A newly discovered document could be:

genuine,

forged,

altered,

misdated,

incorrectly attributed,

misunderstood.

Historians therefore examine:

provenance,

handwriting,

paper/material,

language,

dating,

archival chain,

consistency with other documents,

independent corroboration.

That is what methodological transparency means here: explaining how you know the evidence is reliable and how you moved from evidence to conclusion.

The fact that an interpretation is new is not enough.

Likewise, the fact that it challenges an established interpretation is not enough.