If it is a mistake, it’s more than one person at fault. Someone put it on the bag, someone left it there, someone approved the packaging, several Lego employees saw the packaging. As Legomaster put it, that’s one bib mistake. It’s one thing if a Skull Spider has a leg or two wrong, but this kinda grabs your attention.
If anything, the only mistake Lego made is showing the mask too early.
Wait a minute… what if this mask is just meant to symbolize Masks in general? It’s meant to symbolize all Golden Masks, hence it’s kinda generic shape, which really resembles the new heads…
We also found this mask in the early Bionicle 2015 leaks, what does it mean? Is it just a preliminary mask of creation or is there other reason behind this?
Lets not forget: It was 2.5 years before we finally got the Ignika in set form. Maybe this could just be a mask that hasn’t been announced yet. Possibly the Mask of Ultimate Power? Other half of the Vahi? If this was a mistake, it was a BIG mistake