Bionicle isn't going to end by a longshot. Most likely the current storyline will come to a close with the re-unification of Spherus Magna by Mecha-Mata-Nui and Mecha-Makuta, Golden Tahu will destroy Makuta from the inside with some lame, mega-blocking deus-ex-machina, God will be in his heaven, and all will be right with the world once again...
That is until 2011, when, 10,000 years after the events of 2010, Makuta's long lost evil twin will attack and a new band of Glatorian-Toa hybrids are sent to find the Greater-Beings to stop his evil reign. This will of course end up being another 10-year-long money-bath for TLC.