Yes, I said as much pages ago...I was subsequently ignored while Chari went on the "Its' the Orelsia Warden from Awakening" spiel in every thread...
And why is it so implausible?
Cuz you showed no proof or any convincing speech, duh. Me, though, I tried to find a logical explanation and thankfully people agreed with me
Any writer, artist, game designer etc knows some basic rules of how to make a tense scene, how to make a badass scene, cool scene, cute scene. There are specific rules and tropes people follow because they work.
This is battle against some epic boss, the biggest spider in the game (and somehow in the Fade, too?). We have the Inquisitor and the Hawke, two PCs who changed the world. The return of any PC is epic enough and demands special effects, special scene, special music and special everything to show their importance (and all three PCs of DA series changed the world, as said by devs), their badassness, their fanfavvourite status. Making some random unimportant warden wouldn't be just illogical from the story point of view (seriously, unless this is a new form of Corypheus) but also a terrible bummer from "rule-of-cool" point of view
You wanna make everyone tremble with excitement? Give it everything you've got, not just some random NPC who is not important at all. If you were right, logically there would be no any other NPC whatsoever. Just Hawke and Inquisitor and that would be enough. Random NPCs either take away the coolness, or die... too easily which also takes away the coolness
So, either this random Warden is a super cool important NPC (and I doubt that since majority of unique NPCs also have unqiue appearance, that's the rule of catching attention) or this is Orlesian Warden