Unfortunatley It Most lIKELY wont, Remember That the OG Siwon and Taemin switched bodies completley. So while Taemin who wished to keep living ended up surviving in Siwon's body, Siwon died within Taemin's. It was also inferred by Siwoon when he said that when he watched "Taemin" die, he didn't see the same Taemin he knew, since the real Taemin "wouldn't die so easily" so to say. From what's been said and shown, he's gone for good. But I could be wrong I dunnoXD Haribo might have something up her sleve
I just imagine real Siwon in a beautiful shiny place without bullies...
IKR? I hope that's the case honestly T_T
TAEMIN'S BODY PLEASE BE ALIVE AND LET HIM RETURN