'Hybrid' races are exceptionally rare in this setting. It wouldn't make sense for their to suddenly be a huge influx of half-elves or the like.

Instead the focus should be upon expanding the customisation options for the existing batch of playable races. Any 'new' races are likely to just be slight tweaks of what we have already. We're unlikely to get anything that isn't just a Hyur with slightly exotic features. At least if the existing options are expanded we'll end up seeing more popularity for the more neglected playable race/gender combinations.