Both are training, but that's to be expected as they both have contracts. I really dont think Glenn would be going anywhere. He is signed for 2019 and is on decent money. I highly doubt the money anywhere else would be any better. He is also very marketable in Brisbane and would have some good third party deals (seems to have deals with Mazda up there), so i'd be surprised to see him leave.
Kahu, well he has always said he wants to reach 100 nrl games and he is very close to doing so. Unless Rugby Union really is throwing some decent money at him I don't think he would leave his contract early either. He is back at training and seems fit and happy so i'd assume he will be staying. But if one of the two were to leave, kahu would be the most likely i'd imagine.