Microsoft trademarked a game called "Eden Falls" for use in the United States. The trademark was filed on April 16 as game software, says Gematsu.
To me, Eden Falls sounds like a wanna-be JRPG with a whole bunch of western influences. That's just the first thing that popped into my mind. Not that that's a bad thing.
As of now, Microsoft has said nothing relating to anything about Eden or falls.
As a hiking and waterfall fan, I've had an Arkansas hiking trail called Eden Falls (shown above) on my to-do list. I'm sure they're totally unrelated.