Because G2 could be connected to G1, it is very important.
Here's another post I posted in the BIONICLE 2015 Discussion topic, but I think it can be accepted here.
I can't find the post that said it, but someone asked if BIONICLE 2015 could be like Star Trek.
> There's a long story which is very successful. Then it stops. Years later, they reboot it, but tie it back into the old universe.
We've already had a couple of parallel/the same characters and events, and yet they are also so different.
In BIONICLE G1, there were two brothers Mata Nui and Makuta. Makuta put Mata Nui in a deep sleep. Later, the Toa were prophesied to come to Mata Nui, an island. Later, the Toa washed up on the shore, and went on a quest to claim their Golden Kanohi and awaken Mata Nui.
In BIONICLE G2, there are two brothers Ekimu and Makuta. They both fell into a deep sleep. Later, the Toa were prophesied to come to Okoto, an island. Later the Toa fell from the sky and went on a quest to claim their Golden Masks of Power, and awaken Ekimu.
EDIT: Is Tahu, Master of Fire going to meet Tahu Mata, Toa of Fire?
-Rest in peace Leonard Nimoy.