User blog comment:Master Sima Yi/Assassinews 03-12-'14 — New Assassin's Creed in Victorian London leaked/@comment-4786308-20150106171334/@comment-3046679-20150107133140

You can select it in the main campaign fairy, although obviously it's not available just yet.

There were these handle-things in Rogue that functioned like the hookblade, maybe they carried over the mechanics here. Since for all their boasting of completely new engine and everything (again, since we've sen this claim with AC3), I still recognize the tackle animation being identical to previous games.