Not saying that it is going to happen or if there has been any negotiations, but there is no roster space currently available for Sione Fainu but it would appear that there have been some sort of negotiations with him and it appears that he has opted to take a Train & Trial deal until a roster spot frees up.
I'm sure he would rather stay here with his brothers and I'm pretty sure Taylan May would have some sort of desire to play with his older brother if there is any possibility of his NRL career being resurrected sometime in the future.
Doesn't mean that you can't sound out someone and say that you are interested in signing them some time down the track if circumstances change.
A lot of things can happen between now and next March.