To say a few more words about this leak so everyone is on the same page since I see the usual conspiracy theories popping up already:
I'm going to avoid detailing how this happened, but I will say that this was neither a "controlled" nor "intentional" leak orchestrated by Bandai and Fromsoft to generate hype or something silly like that. It's your usual run of the mill leak. This trailer was made by Bandai for internal use only and there's a good chance From probably wasn't even aware of it, let alone in control of it. This specific trailer wasn't intended to be viewed by the public at this or any other time as far as I can tell. I will also state that while I have heard that a reveal is in the works for "soon"(tm), this leak surfacing now is merely coincidental and isn't an indication that anything is going to happen right this second. I doubt this "forces Bandai's hand" into doing anything sooner than they want as it seems like they were already made aware of the situation prior to it going public anyway.