It's not 100% confirmed whether this will make an appearance tomorrow morning during the Paris Game Show livestream, but given the timing of the rating you'd have to think it's pretty likely.
Gematsu has spotted that a rating has appeared in Europe for DRIVECLUB BIKES on the Pan European Game Information website, which is the European equivalent of the Australian Classification Board.
The rating is different to the rating for DRIVECLUB and says "the content of this game is suitable for all persons", with the game rated for ages 3 and up. It's listed as being on the PS4 and has a release date of October 27, although that is presumably the date of the decision being released.
PEGI's rating links to the official website, although that page has no listing or information about DRIVECLUB BIKES. I couldn't find any info about this new spin-off in the page's source code either.
Still, with this appearing less than a day before the Paris Game Show kicks off it's hard not to connect the dots. And it's also nice to see that Evolution Studios is still working on projects despite the immense problems throughout the course of DRIVECLUB's development. (Presumably, of course — the PEGI listing doesn't have any information about the developer or publisher.)