User blog comment:Master Sima Yi/Assassinews 19-03-'14 – Two Assassin's Creeds for 2014?: Unity and Comet/@comment-187.38.115.3-20140611130036/@comment-5019018-20140611145747

Assassin's Creed: Unity sounds less milked than Assassin's Creed V. I'm not sure if that's a valid reason to not use numbered titles, but I can't think of many others.

Unless of course this was a "why the hell not?" kind of decision.