I think we're likely to see an incremental reintroduction of squats into the setting. If this guy sells well they might go for a full squat gang for necromunda with rules to use it as a choice in imperial armies.

Generally GW studio plans things 2-3 years in advance so if they waiting to see how he sells before they commit to a full army we will not see a squat army for several years.

Also, I'm not really sure how they can do the dwarf archetype in 40K without them all becoming mini-terminators/marine.