While I do not see the Warden-Commander being prominent or physically present for Dragon Age: Inquisition, Let's consider the following:
- Concerning World-State: Regardless of whether or not the Warden lived, the events of Awakening naturally still happen. Thus, the role of the Hero of Fereldan in any such utilization, if dead, would be given to the Orlesian Warden who was usable in their stead. In this regard, it is no different than replacing a killed Grunt in Mass Effect 3 with Urdnot Dagg. (who was just as cool as Grunt in that mission!)
- - Concerning the Orlesian Warden: Simply giving them one voice option with an Orlesian Accent would be no issue in that regard nor is the custom face matter I.E. the Hawke Treatment, (class too is naturally irrelevant. Likely the game will steal the class your actual warden used and transplant that onto the Orlesian Warden) what matters is the dialogue.
They would not have intimate knowledge of the occurrences of the Fifth Blight, but could instead be asked what they were doing at the time in Orlais (attempting to get into Fereldan, asking the Warden-Commander of Orlais to march into Fereldan anyways, ETC). We know that the Warden was personally given a new uniform by Empress Celene, not to mention that they must be pretty experienced/seasoned in order to be made the new Commander of the Grey of Fereldan...they must have some stories to tell both of the events of Awakening and of their life before and after! Given the past of the Orlesian Warden is a blank slate, Bioware could be as creative or vague as they want in that regard.
As Commander of the Grey in Fereldan, his/her identity would surely be known, referred to as 'Warden-Commander Caron/Andras/Kadar' depending on the race.
-- Concerning the Hero of Fereldan
Naturally trickier given the ravenous expectations that people would have of it (and the venomous reactions our less tactful community members would have of it), they could handle a few things a few different ways:
- In matters of voice: they could have up to two different voice types per gender or have no voice at all. For comedic effect, they are interrupted every single time they open their mouth to say something either because someone or something interrupts them in an urgent or random manner. Both of these naturally have drawbacks: a voiced warden will have people screaming to the heavens that 'The Warden doesn't sound like my, Warden boo hoo!'. The fact that there's no option in the keep for the Warden's personality increases this issue as well.
Now, a silent warden makes it difficult to interact with the character: why WOULDN'T they say anything unless their tongue was cut out? Do they have a terrible cold? Stop interrupting my Warden I want to hear them speak!
. . . essentially, people want to hear them speak, but want them to speak they way want them to. This will never happen and people would just have to grow a quad and deal with it. The best solution that can be made is to have, during the 'Warden Creation Process' is to select between a few different personalities similar to what we have for Hawke in the Keep: You could have a 'Dignified' Warden, a 'Quirky' Warden, or an 'Aggressive' Warden. This personality select would be in place for the Warden Commander as well, but they are a significantly lesser issue.
- In Matters of Dialogue: They would have to be vague on matters, and I doubt that the player would be allowed to pester the character endlessly about all the adventures they've had, given the fact that the Warden is rather busy on the mission the player is likely encountering them upon. This would help keep the character's 'Fan Integrity' in check by preventing the player from digging into the Warden's entire backstory. You might be able to ask them a few questions such as:
"Tell me about yourself." The Warden then would give them a brief summary of their 'background origin', then talk about the blight in passing, and then talk about their time as Commander of the Grey. Nothing difficult here. The player could then ask for details regarding the events of their origin, the Fifth Blight, or about their time as Commander of the Grey.
Asking about any of these things would use more of the 'personality' types given to the Warden at the Creation Process. An Aggressive Human Noble Warden can focus more on killing Howe and avenging their family, while a Dignified one may make some solemn remarks about the final moments of their parents. . .meanwhile a Quirky one may think back on Nan and the Larder Incident or generally avoid the matters of the origin story entirely and instead focus on past memories.
But regardless, the questioning would be kept brief due to the nature of the two characters meeting and prevent the player from complaining too much that 'this isn't my Warden!'. As much people would probably likely to talk to their Warden about EVERYTHING it's for the best that they don't go into a huge monologue every time you ask them something. . .I mean seriously, that's boring right? Who wants to sit there and get someone's life story every time you ask them a question?
"Would you like a cup of coffee?"
"My story begins in the Sixteenth Century. . ."
- Concerning the Quest
How would I know, I don't write for Bioware. All I know is that the role of the HoF is easily transplant-able onto the Orlesian Warden.