Bundled out in the quarter finals by Fiji, the Kiwis had a shocking campaign that included a loss to Tonga.

Marshall, a former captain who represented New Zealand 27 times, was overlooked for national duties and has not represented his home nation since 2012.

The 32-year-old was forced to watch the World Cup from his commentating chair with Channel Seven and reckons he would have had a positive influence on the side if picked to play.

"I just wish I was in the team, I could have helped," he said.

"I'll never make myself unavailable for New Zealand. It's my country and I will always play if they pick me. I will always be available.

"I thought maybe off of last years's season I might have been a chance, but at least [coach David Kidwell] was honest with me and said Tamaire [Martin] and Kodi [Nikorima] and Thomas Leuluai were ahead of me at that point of his decision.

"Experience wise, just in the halves and managing the game - that [Tonga] game especially and maybe the ones before - I think in camp situations I'm pretty relaxed and not so serious.

"I like bringing all the boys together, that's how I am. They could have done with a bit of that."

Marshall has signed a one-year deal with Wests and returns to the club which he debuted for in 2003 before helping them to the 2005 premiership.

He was forced out the door in 2013 after making 201 appearances for the club.