The thing i find really funny about all these threads is most agree the Inquisitor will, if not should, return in some fashion. The general consensus is that there are things that don't make sense without them being there.
I respect that people didn't find the Inquisitor interesting, and that it may very well be at ends with what the Devs have in mind for DA.
The main idea people are spit balling is that we "work" for the Inquisitor, but i see two problems with this idea:
1) We did that before, and people didn't like it. So doing it again would be silly.
2) It undermines that "Solas knows us", because anyone associated with the Inquisitor would be kept tabs on. In which case, a new PC is pointless anyway.
We're not going to get a clean break from Inquisition, so i do agree the Inquisitor should have a role. Depending on various factors, they may need a bigger role that our other cameo connectors.
I'm pretty much at a loss, to be honest. I don't see them doing dual protags, because we'd only be playing as the Inquisitor in talking cut scenes, which seems rather pointless and goes against storytelling in most cases. So it's a matter of one or the other, with the most likely case being a new PC.
I really don't understand why they ended Trespasser as they did. I loved it, but it felt like "welp, that's this plot wrapped up. Never mind the explosion of a new plot, little Inky, we've got Jeremiah Noname on it! Go have some tea, put your feet up".
And waiting is probably going to continue until some time after Mass Effect comes out, i think, so threads like this are going to keep popping up.
Although, if that book has something to do with DA4, it's almost like a guarantee Solas' story will have a major impact. What with the wolf head, chess piece looking design. I live under a rock, so please tell me if we actually know what that was 