I would not be surprised, however, if they already have an agreement (and kept it in his name until after the announcement, so that it would not be 'leaked' by the whois changing).
A few years ago I sold a domain to a major video game company. They created an entirely new Delaware LLC to receive the name and hide the fact that it was an upcoming franchise.
In no way do we need to acknowledge that. If strangers show up at my house looking for you every hour, that doesn't mean that you should "probably" own my house.
If Nissan wanted the domain, they should have offered a fair price rather than trying to take it via a unfounded lawsuit.
When I first read this I was thinking that this might be an Alphabet-type situation where the domain name doesn't really matter but I'm not getting that impression now.
They probably should have waited to announce the rebranding until after they negotiated for the name...