So this guy might be playing Jonathan in 3B....
Meet Luke Baines. I stalk certain Shadowhunters update accounts on Twitter occasionally, and I've seen his name a couple of times, mostly from posts of him hanging out with the cast. At first, I'd assumed that he was just one of Dom's friends who hangs out with them, but Kathleen Jenkin's tweet(s) about working with him made me suspicious. (You can see more sources under the Trivia section on Jonathan's page on the wiki.)
And now with the news that Jonathan will now be portrayed with his real look (no longer posing as Sebastian, so not Will anymore) and no longer charred (probably because of the way the ritual was performed) and thus by a different actor, I'm more convinced that he'll be playing Sebastian. (The first time I thought about it was when ShBR asked bout it tbh - https://twitter.com/ShadowhuntersBR/status/992616018727104512) People are posting about him on Twitter now, and he's kind of reacting, so I'm pretty convinced right now!
I'm a strong believer in giving actors a chance before judging them, so I look forward to seeing him! Also, recent castings on the show has yet to disappoint me, so I'm confident he'll pull it off (if it's true). Also checked him out on YT and his pics and he gives off a pretty good Jonathan vibe (I feel like his face, expression and bone structure were made for Jonathan in general lol; my opinion!) and it seems like many of his roles have been dark, Jonathan-like. Also don't know if it's just me, but he kind of gives me a JCB x Evan Peters vibe; lol don't hate me. (Anyway, I'm kind of FOR him right now which I think is why I put so many photos of him in the collage lol, to get many of his Sebby-like shots.) At this point, since many have already guessed, I wish they'd just announce it if it's true.
P.S. Please guys, no hate! We all (okay, most of us) love Will and will miss him, but I always kind of knew that this was a possibility because Will was cast as Sebastian (Jonathan as Sebastian and the real Sebastian). I repeat, no hate. You can give your opinions but don't be rude. :)