Frankly, considering that nobody in his sane mind would touch the franchise with a ten foot pole ever again, and considering the state of nowadays target audience of the more popular games, I think this is a very hpothetical scenario. At least for me, it doesn't make much sense to invest time in imagining what it could look like. It's unrealistic, and therefor I simply won't waste time on it.
I think it makes much more sense to imagine scenarios for Dark Mod missions.
If anything, in future times, I hope for a Dishonored 3. Sure, it's not Thief, but, it's what I'd imagine a goo more Thief-y game should be like. I played through the whole series for a second time recently, and, man, it's so good that I really wonder how the majority of people can't enjoy such absolute gems. Which, again, speaks volumes about what nowadays' gamers are like. Just like anything with mass appeal, video games completely went down the shitter.