Paul Farquhar
Legend
True, I forgot about the inquisitor. But I was under the impression from the final series of The Clone Wars that Ahsoka was very very busy elsewhere at the time of Amidala's funeral. There seem to be shots from Qui-Gon's funeral mixed in.It could be part of Ahsoka's story, in her post-Clone Wars / pre-Rebels activities. We also see an Inquisitor confronting her, after all.
Are we sure that's an inquisitor, and not a pre-Phantom Menace Sith? That does look like Tarkin behind, but I can't be sure, and that looks like a Darth Maul double sabre rather than an inquisitor "wheel" sabre. The trailer is cut so you can't tell who is actually facing off against this character.