"Asked about reports linking him to rugby union and the NSW Waratahs, Marshall said: "You guys know more than me.
"That's not my focus. That's why you have a manager to do that stuff.
"At the end of the day, I'm pretty sure the club is trying to do something to renegotiate my contract, but this week is a big game for us and I've just been focusing on that.
"After the game I'm sure I will be able to sit down and talk about what's happening in the future, but for now it's about this game.
"... At the end of the day, I'd love to be here for life and if the club sees it that way, I'm sure I will be.''
The New Zealand playmaker has struggled for form this year and admitted he hadn't been at his best.
"I'm probably not (happy) in my form. It's a bit patchy lately, a bit up and down.
"I'd like to be playing better, there's no doubt about that.
"In terms of happiness, I love the club. I've been here for my whole career and I've got a lot of mates here.''
-AAP