3. It's Nothing
It's possible the situation was created as smoke and mirrors to prevent any spoilers on the Xbox One reveal. Microsoft registers a bunch of domain names related to the keywords 'Xbox Fusion' knowing that anyone digging around could find the information. The found information then goes viral before the reveal. Leading everyone to think the next Xbox will be the Fusion. But it's all a bit too conspiracy theory-ish. Then there's the fact all domain names under 'Xbox Fusion' redirect back to Xbox's main website. Microsoft didn't register any other Xbox related domain names this year. The last time Microsoft did register a domain name relating to Xbox was back in 2012 with Xbox8.com. But Microsoft never went as far as redirecting any of the Xbox8 domain names back to its main website. So maybe Fusion still serves a purpose at Microsoft. Evidence certainly suggests Fusion could still be a part of the Xbox family going forward.