For those who ask why Nendoroid Luigi is announced first instead of Nendoroid Mario, well, I think the reason is that this year is supposed to be The Year of Luigi, which is a special event held in 2013 and 2014 in commemoration of the 30th anniversary of Luigi’s debut in Mario Bros [source].

A Nendoroid made to celebrate the Year of Luigi!
In commemoration of ‘THE YEAR OF LUIGI’ comes a Nendoroid of Luigi from Super Mario! He comes with three expressions including his standard expression, a smiling expression and even a surprised expression – allowing you to display Luigi in all sorts of poses!
He also comes with dash and jumping effect parts, as well as a pipe to bring out the atmosphere of the game! Two of the classic enemies Super Mario enemies, the Goomba and Bullet Bill, are both included allowing for various classic scenes from the game to be recreated!

He is scheduled for June 2014 release, priced at 4000 Yen.

By the way, there is an interesting note mentioned in the blog post by Kahotan:

Nendoroid Luigi comes with an inner cardboard sheet with the game world in the background!

Nendoroid Luigi + green pipe + Goomba + Bullet Bill + background = Perfect! XD

Are you getting him as well, Nendonesian?

via GSC and Kahotan’s blog