Microsoft has apparently bought a variety of domains for this name
While no other official details are known, the console has received plenty of reported names, like Xbox 720 or its codename, Durango.
Now, Fusible reports that Microsoft has just registered a bunch of different domain names for Xbox Fusion.
The website also notes that Microsoft's doesn't actually own domain names like Xbox 720, Xbox Durango, or Xbox Infinite, so it's not likely that the next-gen console will have any of those designations.
As of yet, Microsoft hasn't commented on these new speculations about its next-generation Xbox console, so expect to hear more on May 21.