When Apple want to, they can design amazing things. So I look forward to see if they come up with a clever Apple-like way to do this. Or maybe they just make it easier to remove the back.
If you buy each iphone components individually through Apple service center, the cost added up to equal multiple brand-new iphone (and you still not have enough components to assemble a full iphone).
Then they wouldn't be able to sell their phones in the EU. Regulators may be stupid, but even they can see that it's a blatant disregard to the rule of replaceable batteries.