Dragon Age: The Veilguard will let you have different relationships with Solas, says BioWare. Following the events of Inquisition, the devs acknowledge that fans will have a variety of views on Solas, and are aiming to make The Veilguard accommodating of this.
The Veilguard's lead writer, Trick Weekes, sums this up by saying that the game is being made for everyone, whether you "loved" or "hated" Solas. So, it seems like we will get the chance to be friendly with him after all, even if the game opens on his plans to pretty much destroy the world as we know it.
"We think we have a story that will work for players who loved Solas, hated Solas, or are new to the series and have no idea who Solas is," says Weekes.
This echoes similar comments made by creative director John Epler in an interview with Game Informer.
"Solas always feels that he is a tragic character, but a hero nonetheless," says Epler. "So, he's coming into this believing firmly that what you stopped him from doing was the right thing [...] But because now he's trapped, now he can't reach out and actively affect, he needs to work with...