The story of "Misterious Champions"

After the announced Lore change i couldn't help but to think insistently about something. What about the so called "Misterious Champions?". I'm talking about all the characters with a misterious past; naming just a few: Jax, Swain, Evelynn and more. Will we able to discovery the secret behind their dark past? Or is Riot choosing to leave the mistery unsolved? I'd personally like to know if leaving an aura of mistery is what LoL new lore is trying to leave, or is it pursuing the famous "clarity" even in champion's background? I'd really like to know what's behind the Grand Master at Arms, or the reason for the Deamon's Jester Behaviour. Is the expansion of the storyline of Valoran going to affect these kind of lore aspects?