User blog comment:Master Sima Yi/Assassinews 19-03-'14 – Two Assassin's Creeds for 2014?: Unity and Comet/@comment-5175599-20140321075830/@comment-13471981-20140321080254

That's what the leaks say; we've yet to hear of an official announcement by Ubisoft. However, since the leaks are look quite believable at this point, I'd say it's a definite possibility that Unity/AC5 will only appear on PS4, XBox One and PC.