Potentially setting up a conflict here between Sirius/Alliance forces and Salvation forces the next time the Thargoids hit the nebulae - though Salvation has been more focused on the Pleiades.
The potential link between "The Witch" and the pre-Enclave "Xeno Research Group" faction in Witch Head could come into play, too, if it exists.
The choice of systems in Witch Head is more interesting - both were originally set up by the Imperial division of the Enclave efforts, and Onoros still has the remnants of that effort. Perhaps also sending a message to the recently defrosted Emperor?
The potential link between "The Witch" and the pre-Enclave "Xeno Research Group" faction in Witch Head could come into play, too, if it exists.
Coalsack was of course a joint Alliance-Sirius venture in the first place, and the Sirius vessels will probably compensate for the Alliance's Coalsack commander defecting to Salvation. VU-O b6-6 isn't historically a great system for Sirius, with their "Corporation" and "Mining" brands having withdrawn from that system previously about a year ago. Being able to get back in will be a useful move for them.“All ships in the area are invited to make use of the Song of Mecchi in the Coalsack Sector Vu-O B6-6 system, the Kandula's Truth in the Siniang system, and the Li Chyou Winds in the Onoros system.”
The choice of systems in Witch Head is more interesting - both were originally set up by the Imperial division of the Enclave efforts, and Onoros still has the remnants of that effort. Perhaps also sending a message to the recently defrosted Emperor?