It could be a marketing strategy.
To first bring the GV70, which will be their bread and butter, and only afterwards the new G70.
Anyway, both models look absolutely fantastic, and most importantly, seem to have top of the class steering feel. Such a rare thing these days.
The model I am very keen on seeing is the G70 shooting brake. If it will inherit rear lines of the GV70, it will be the perfect dad mobile imo.