Yes, I'm waiting for Red Bull, too. They're being really secretive... so either they have some amazingly innovative new design that they don't want anyone else copying, or else they want to pretend they have
But I think we are all suspecting that once they start racing, Mercedes will pull away from the rest. Remember that the main reason Red Bull were able to close the gap in the second half of last season was that Mercedes had already stopped developing their 2020 car to start on the 2021 iteration... so Mercedes, the best developers, already had months of headstart on the other teams...