User blog comment:Master Sima Yi/Assassinews 31-03-'15 — Assassin's Creed Chronicles announcement trailer/@comment-3046679-20150422202343/@comment-1153722-20150422202832

Yes, I think it was in a survey that Ubisoft asked what soundtrack people find the most iconic for Assassin's Creed, and the end result was Ezio's Family, so that is being used thematically in all soundtracks henceforth.

And I'm sure that if it was possible and reasonable to get Roger Craig Smith, they would have.