It looks like the soon to be announced Tamron lenses have all leaked according to one site.
The Primes will be:
and the Zoom will be:
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Tamron 17-28mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama
Tamron 28-75mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama