There is a new interesting feature on the Lego Shop website. Before today, if you typed "Bionicle" into the search bar, you'd be redirected to the Hero Factory merchandise page. But if you type the word in now, you get led to the page as view above, stating the following:
The items you're searching for have not yet launched. They are coming soon so keep checking back for more information. You can also sign up for our emails to stay up to date on the latest sets!
It is possible this is Lego confirming the return of Bionicle, but since its discovery the page it has been taken down and once again redirects to Hero Factory. Lego are still yet to make an official announce about the theme's return, but right now it seems likely.
at 10:59 pm