Right of these last two Gens, they gave 5 of the starters introduced hidden abilities that were (at the time at least) exclusive to that line alone (Jangmo-o line gained Bulletproof in Gen VII and 'Roar line got Intimadate).
So, what do you think will happen this time out?
>Will the new crop get brand new abilities?
>Will any get an ability to boost their VGC usage?
>What chance for all three to get decent abilities?