Not at all.
Sam Perrett, Jacob Loko, Thompson and Chase Stanley all off contract then.
I'd imagine Sam may retire. Loko & Stanley would be one or two injury away from giving it up too.
I see Sione as the long term fullback to be honest.
That said I wouldn't be surprised if they pulled out to stay at Knights. They will no doubt guilt them all year and throw massive massive money to keep them for the fans.
Don't worry, you won't have to wait until Round 13 next year - Knights will have Sione, Pat & Chanel wrapped up well before then.