I'm not sure how Max had this much energy in the middle of PAX Prime to speak in front of a camera about Assassin's Creed -- for over eight minutes, no less -- but he did. What a champ.
Conceptually, I like the sound of chasing (and being chased by) assassins in Rogue, and the return of naval combat with enhancements is pleasing. Same goes for the great auks.
Still, between the two, I imagine folks tend to be more interested in Unity, what with it being current-gen and all.