Honestly, I think it's better for the fanbase if it doesn't return. We were sad the first time it ended and sad the second time. Do you really want to take part in a cycle of happiness, followed by "oh... it's not as good as it was," followed by sadness after it inevitably gets canceled again? No matter how good a new generation might be, the older fans will always prefer G1 because they grew up with it, and if Lego tries to cater to the older fans as well as the newer fans, it would just be such a mess and end up being terrible. That might be why G2 didn't go so well. It tried to bring back older fans using the names of the Mata, similar masks and weapons, and the Uniters were probably meant to be the recreation of the Nuva. Or maybe the Phantoka. But it was this desire to appeal to the older fans that hindered what the sets could have been. If they just started over with new characters, they would have more artistic liberty to design the sets. You might say "but it's not Bionicle without Tahu!" That's not for us to decide. That's for Lego to decide.