Here is the answer from an Ali Niesen, who, if you ignore the obvious lack of grammar and address, puts final paid to any Tamron/Fuji X-mount rumors.
"No I am sorry we only plan to make it for Canon and Nikon.
office | 631.858.8430 fax | 631.858.8462
Tamron USA, Inc.
10 Austin Blvd, Commack, NY 11725"
Maybe the admin can lock this topic now as any further discussion seems superfluous.