This is incredible!! I adore the art style, while its not very bionicle, as an artist myself I’m definitely voting for this when the time comes.
A few notes however:
-As stated in one of the comments, Gaaki’s mask is not exactly what the designer thought was best and I think that a much better design for it would be the one used in this entry: Toa Hagah, the Elite Guard (Canon Contest #3: Honor Guard)
-Second, I noticed that you changed Pouks’ spear tip to the Deckar and Defilak blade from the Mahri era, I think it works fine but maybe the convenience of the previous spear tip actually existing in gun-metal grey would make it a more suitable choice?
Aside from that, I love it, even without those tweaks its still amazing