NeoGAF is at it again and managed to spot what looks like an Xbox event coming up. They've discovered that the event planner Eventcore registered the URL XboxEvent.com which currently doesn't have anything. The domain was registered yesterday, right after the PlayStation Meeting 2013. It's also worth nothing that Eventcore put together Microsoft's E3 last year, so it's likely that they're setting up another event right now for Microsoft.
With the url XboxEvent.com, one can assume it has to do with the Xbox and probably the next unveil or announcement in mind. CVG has also reported that Microsoft will showcase their next-gen console in early April.