There's rumors saying that Bionicle will come back in 2025, this is probably true. However, Ninjago could compete with Bionicle and Ninjago doesn't look like it's going to end any time soon. Plus The Merge has realms colliding and new realms may form during the series. We know that there's at least one Cyber Realm inhabited by robots because of the character Lobbo.
So what's the chance that LEGO is planning to make a Bionicle Generation 3 that's a reboot of Bionicle set in one of the Merged Realms. If this happens then Ninjago and Bionicle could have crossovers and connected stories. This will introduce Bionicle to a new generation and could be a decent marketing strategy.