As I said in a previous post, from a source I have who seems to have very strong info, Taylan is not coming. Without going into full specifics but to give enough to give info, agreements were in place to follow a process to decide if he was going to be signed. That process took place, didn't go well, and club wanted to keep Terrell focused on football rather than his brother and any possible issues, so walked away which they had the right to do.
Things may change, but my source basically said from what they know, it is not happening.