User blog comment:The spy1/Why did LEGO just decide to reboot the story?/@comment-46464-20141015222420

As always, BIONICLE is aimed at children. A good deal of the target audience of 2015 wasn't even in preschool at the point the previous story ended. It would be pretty absurd for LEGO to make those kids actually go and catch up on ten years of story released as books, comics, movies, online animations, story serials, video games, etc. much if not most of which is no longer available anywhere. The best option from a marketing standpoint was to start over.

I personally am happy with the reboot. It looks like it will be a little more kiddish than original BIONICLE, but Pokémon is kiddish and it's still taken seriously by thousands of adults around the world, so kiddish isn't necessarily bad. The sets for the most part look pretty impressive and the backstory is cool. I'm mostly just excited for books and online animations again after the last couple years of the old continuity were so dominated by poorly-written story serials.