I doubt it. The worst case scenario, highly unlikely, but let's say it did happen: they can get the domain name. But Hive is not one domain or website. Even for blogging most people use peakD, ecency or Leofinance.
That's why I believe there is a lot more opportunities for them in cooperation rather than conflict.
Yeah that's a good point. Hive is decentralized in more ways than one.