I am not so sure the rebates will be immediately available. The car will be a hot seller in the first part of the model year. Those big rebates start to be introduced mid-to-end year as dealers are anxious to clear out inventories. If dealers can stand to earn a decent premium while the new product is still hot out of the oven, they have no reason to give generous rebates if the cars are flying off the lots.
Nevertheless, I would buy right away if such rebates or incentives are offered. That 0% APR is not easy for everyone to qualify for, but either way, you end up saving about the same amount of money no matter which one you take. Such generous rebate savings are just about equal to 0% APR when it comes to the bottom line.