Sorry for my bad english it is not my native language but I want to say that I will create a 3D hair model personaly for Solas if he is LI and, I will need some help from programmers to add model to game.
But to be honest I don't think he will be LI. I think Bioware will hide who are LI till the release, just to give us some room for discussions, speculatings and other things that good for game advertisment. Also Let's think about previous romance options in Dragon age games. What we had before? We know that most people like different types of people, Some girls really likes good and simple guys with some muscules and with short hairstyle. Just look at the Alistar, he is just what most of girls like, then Anders, I think Alistar and anders wery similar, exept hairstyle, both humans, both with surprises, they even have simple noses and both like animals, dogs and cats. I nearly sure Cullen will be our third simple good guy in dragon age game, he is human, he is good guy, his face and hair colour remind me of Alistar, just need to play a game to learn about Cullen favorite animal.
Some girls don't like simple good boys and prefer "anime" boys that looks a bit femine, tall and thin, with hard past, so girls can pity and hug such boys. So there we have Zevran, hard past? Yes, long hair? Sure. Can be mistaken with girl? Oh yes, just remember his lips and big eyes. Then Fenris, well he was even more femmine and thin then Zevran, only his brutal sexy voice tells us about his gender.
Can Solas stand near Zevran and Fenris? I'm not sure right now about that. He missed few things to be awesome as previous two elven LI. Personaly I was hoping to see someone like Sand from NwN2 but there is a lot of time till release, I think we will know much more later.
Thank to all who was able to tolerate my bad english and read all that wall of text =)