I doubt The LEGO Group will ever bring back Bionicle in its traditional form, but I'd like to see a new system of CCBS. The building style is extremely diverse, and could continue on into the future if there are new waves of compatible elements. Like a universe of robots who are, idk, trying to fix the environment on an alien planet kinda thing. You have the good guys who have powers related to nature (water, earth) fighting against the villains with destructive powers (fire, electricity/storms.) There's always a possibility of a new CCBS line, but its not in the cards for the immediate future. We can dream.
Back to the discussion at hand, we can preserve our collections, and hope tech evolves to the point of recreating and continuing bionicle indefinitely. Plastics are only ~140 years old, the first 3d printer was made in the 80's, they first became economical in the late 2000's, and now they can print things that look much more streamlined then they did even 5 years ago. We are close to a point were people could 3D print LEGO pieces with similar quality to LEGO without the crazy molds. Thats still in the future, but its not too far off.