Honestly, personally, I’m really hoping for something that just takes a lot of the core aesthetical ideas of Bionicle and uses them to tell a collection of interesting stories that are made more interesting by the nature of Bionicle, but not entirely reliant upon it.
The blend of high-tech with nature in the way Bionicle did it is something I can barely think of elsewhere, and once those core world concepts are established, the scope of potential stories to be told within the setting increases exponentially. Recently I’ve been all but fixated on the vague idea of a Bionicle Detective Noir set in Metru Nui, featuring a Matoran PI trying to deal with the increasing presence of the Vahki as they solve cases. I haven’t gotten besides that vague idea and don’t really plan to, but I think Bionicle’s strongest potential is as a setting. It increases the amount of sets that can be sold, the formats and mediums it can be told in, and the potential appeal to different audiences.