I still confident that Tahu is confident of still playing this season (if that makes sense).
There has been no announcement that Tahu is out for the season. He underwent an operation last night, and Coach Hagan was talking about Tahu undergoing intensive physio over the coming days in order to make it back for this weekend. He did allude to the fact Tahu was in serious doubt, but nowhere has anyone said he is definatively out for the remainder of the season - that is pure speculation.
Whether or not his knee is up to it or not, Tahu wouldn't be undergoing intensive physio this week unless he considered himself a slight chance of playing.
He may not return this season, so don't come down on me like a tonne of bricks if he doesn't play - but there is a possibility he will play, otherwise he wouldn't bother with the huge amounts of physio.