A whole lot, from 12 different colors of Krana, plus 8 types of Krana, and 2 new colors for the original Kanohi, and 6 new types of Kanohi Nuva of 6 colors, that's a whole lot.

(12 x cool + (2 x 6) + (6 x 6)
96 + 12 + 36
= 144 collectibles

Krana:
(All come in Blue, Yellow, Orange, Purple, Red, Grey, Green, Tan, Lime Green, Light Blue, and White colors)
Xa
Za
Vu
Ca
Yo
Ja
Su
Bo

Kanohi:
(In colors of silver and gold)
Hau
Akaku
Miru
Kaukau
Pakari
Kakama

Kanohi Nuva:
(in original colors: Red, White, Green, Blue, Black, and Brown)
Hau Nuva
Akaku Nuva
Miru Nuva
Kaukau Nuva
Pakari Nuva
Kakama Nuva