User blog comment:Master Sima Yi/Assassinews 03-12-'14 — New Assassin's Creed in Victorian London leaked/@comment-86.61.14.118-20141226155129/@comment-3046679-20141226174247

Rogue is only 7-8 memories shorter than Unity, you just don't feel it in the latter since it has 12 sequences, but each has 2-3 memories.

But since Unity is getting Dead Kings, I imagine Rogue will get something too, probably after PC version comes around so they can pander it to all the owners at the same time.