Seeing we only have the Radbull, we might not get any other Mazdas. We didn't get any other Mazdas in PC1 DLC. I say we have a better chance of getting more Hondas and Toyotas over Mazda.
Yes, I would say it's more likely we see more Hondas and Toyotas before Mazdas. Other than the Radbull, SMS haven't featured any Mazdas since Shift 2. Though I do believe if we were to see any Le Mans Mazdas, it would be the 787B over the 767B, based purely off the assumption that it seems SMS primarily goes for the cars they want in the game, and secondly fits them into a class they could or should be in. In any case, whatever new cars come to the game, they'll be welcome additions.