I have no Idea what Lego intends to do with their next Constraction Line or even if it's coming personally I'm sure that if Lego DOES release it's own IP constraction line again two things will happen
1) Lego will have gone back and looked at why Bionicle failed and amend those errors.(Marketing, Budgets, Online and Physical presence for the product etc.)
2) I'm sure Lego has learned that a constraction line will not sell well without a decently developed story and likeable/relatable characters. (And to be fair that that rule of thumb even applies to their Sytem lines too) and they'll have gone back and fixed that as well
I also kind of hope Lego will continue improve the building of their CCBS products so that Lego can have a good quality products without having to rely soley on Robotic-looking characters and they can branch out with this system and maybe even have it branch out with other themes like Superheroes (because let's face the majority of those old one back in the day were quite cringey) and improve other themes like Star Wars, as well as go on to do other things like Dinosaurs, Monsters, Humanoid characters (organic ones) etc.