Counting Turaga
So... open question to the Bionicle fandom: how many Turaga are there? Or, perhaps, putting it better: how many Turaga are there supposed to be?
Without really thinking about it, I have two not-quite-compatible mental images, which we'll call "Plenty of Turaga" and "Turaga are Rather Rare."
Plenty of Turaga comes from the original years of the saga: there are six of them, one per village, as many as the Toa. There's a footnote on BioSector01, on the Turaga page, that Greg said there were more Turaga than Toa left at the end of the story (so, "more than 58" as the page put it).
On the other hand, the rest of the saga really has me imagining fairly scarce Turaga: there's never more than one mentioned in Metru Nui, Jovan seems to have been a Turaga alone. The norm seems to be: one Turaga, one village. Metru Nui, in particular, seems to highlight this contrast: there were 11 Toa Mangai, but there's only one Turaga.
Thinking about this, I suppose that it's partly just attrition: the same thing happening to the Turaga that happened to the Toa by the end of the MU. And not every Toa is going to survive to be a Turaga.
What if it's by design? What if there aren't SUPPOSED to be that many Turaga? A village may need a team of defenders, but does it really need more than one sage leader in the same way? When the Great Beings made the first Turaga, how many Toa did they expect to transform?
What really has me thinking that the ratio of Turaga to Toa probably isn't supposed to be 1-to-1 is Destiny. If it really is the case (I've grumbled about this before) that only certain Matoran are destined to become Toa, why would it be the case that all Toa are destined to be Turaga? Doesn't it make more sense for only certain Toa to be destined to be Turaga?
(Sidebar: destiny in Bionicle is basically whatever you want it to be--it's as malleable as time travel in Doctor Who, but I don't think it matters for this argument if destiny means "programmed from the very beginning," "an ever-changing, ever-adapting plan of Mata Nui to meet the circumstances," or something else. At least as long as you don't stray too far toward the edges...)
I find that I actually really like the idea that Turaga might be rarer than Toa and only the destiny for a few of them, larger because it really makes the Toa Metru take center stage: if the norm is that only a few Toa become Turaga and then an ENTIRE TEAM becomes Turaga, that means they are special, right?
From a meta perspective, of course the Metru as special: they're the archetypes of Turaga for any fan who followed along from 2001. Having it turn out that they're actually a massive reversal of what is normal makes their personal destinies fit really well with the reveal that the island paradise of Mata Nui is not actually where they belong: fans imagine Mata Nui (and plentiful Turaga) as the default for Matoran, because we entered the story there, but an island paradise (and a whole Toa team becoming Turaga) is not what was normal in the MU.
I also like it because it lets you have fun with the "who really is the destined team of Toa" story, where Mata Nui is putting forward the Toa Metru and Teridax is nudging forward the Mask Matoran. If the Mask Matoran couldn't become Toa, then what was the point of that? Lhikan would give them stones, it wouldn't work, he'd take them back, and he'd try again (right?). On the other hand, if they were able to become Toa, what's the advantage to Teridax in picking those six rather than the other six?
My proposed answer: Teridax has no idea. He can just read the signs that Mata Nui wants the Metru, so being the contradictory bad guy that he is, he figures a different set of Toa has got to be slightly worse. After all, Teridax has picked off a lot of great Toa already--the new Toa will need to be superb to do what the Mangai couldn't, and if the new Toa aren't quite what Mata Nui wants...
But what Mata Nui really wants isn't warriors; it's wisdom. The Metru do important and valiant things as Toa, but the single greatest thing they do is sacrifice their power for the Matoran, and that was an act of wisdom. When Mata Nui picked them, he wasn't only picking Toa who could save them once in battle, but Toa who could save them again in transforming, Turaga who could lead them.
I think this takes a little bit of the sting out of the end of LoMN (not necessarily a good thing--bittersweetness and loss is a huge part of Bionicle--but I think we do want our faves to be happy and significant). If being a Turaga is special and rare, then there's a eucatastrophic miracle in all six of them becoming Turaga at the end: a miracle that speaks of hope in a dark hour.
Maybe it would also explain why they founded six villages on Mata Nui: one village for each Turaga.