There's two Backbones - one in California and one in Vancouver. I could be wrong, but I think the California one is the one that does all the retro ports (the remnants of Digital Eclipse) whereas the Canadian one is the one that does all the original games.
That's a fair point, but I think the fact that it's a Western-based announcement of a retro collection changes that. We knew about Mega and Gems Collections by their Japanese announcements, or at the very least because they were also announced for Japan; the fact that Sega of Japan is nowhere in this press release leads me to believe that this is another example like Sonic's Ultimate Genesis Collection: a collection done by SoA/SoE for America and UK (and not getting a Japanese release). Which means Backbone.