Our source was spot on and indeed this is the first image of the new Tamron 28-75mm F/2.8 Di III RXD Full Frame E-mount lens for Sony! It should be announced on February 22.
This is the first non-Sony FE zoom lens. Tamron was also the first third party lens maker launching an 18-200mm APS-C E-mount zoom (here on Amazon US, Amazon DE).