This sat in review for a while, so I'll review it.
Well, here's a little idea I'm working on. Thoughts?
With the disappearance of the Toa Nuva in Karda Nui, tensions are running high across the Matoran Universe. The Makuta not engaged in the universe core have launched a massive assault, and The Shadowed One has reluctantly allied himself with their Brotherhood. The battle becomes even more desperate, however, with the sudden defection of the Toa Mahri to the enemy side. Fears that other Toa are secretly Makuta agents have spurred a massive witch hunt, encouraged by Turaga Dume himself.
Toa Nuva disappeared. Pretty standard. Why did the Mahri defect? How did these rumors get out?
Treachery takes place all across the Matoran Universe as the final battle for the fate of Mata Nui is being waged. Mata Nui's protectors are beginning to crumble, however, as their unity shatters from within.
The Brotherhood of Makuta are the ultimate evil. They are leading attacks all across the universe under the orders of Teridax. Most of the Makuta themselves, however, are battling the Toa Nuva in Karda Nui; Tridax has taken direct command of the Brotherhood from its headquarters on Destral. Teridax's current location is unknown.
So the Toa Nuva's location is still known? Why Tridax? Wouldn't Icarax be a better choice? He was the one trying to take over the Brotherhood.
The Dark Hunters were convinced (or possibly threatened) into joining the Brotherhood on their conquests. They're currently engaged in guerrilla attacks on various islands.
You said that in the first paragraph.
The Protectors of Mata Nui, assembled from the ranks of the Order of Mata Nui, assorted Toa, the Voya Nui Matoran, and the old Koro guards, are desperately attempting to hold back the Brotherhood and the Hunters on many different fronts. The tide of battle seemed to be turning, and they were planning an assault on Destral itself, when the shock betrayal of the Toa Mahri sent them into disarray.
Like I said before, why did the Mahri deffect?
The Order of Mata Nui itself will deal with any traitors that are found guilty by the ruling council, consisting of Turaga Dume, Toa Helryx, and Keetongu. Traitors are sent to the newly repaired Pit to await further judgement when the war is over.
May I ask how Keetongu, a Rahi who didn't like people and couldn't speak Matoran got on the council?
Players can create a character from any of these factions, or even a neutral non-participant in the war.
The storyline will be centered around the Battle for Mata Nui, and well as the Shadow Hunts, and they have come to be called. Every character can be potentially suspected of treason; the Makuta may deliberately spread false rumors about this in an attempt to weaken their opponents. Any player accused of treachery will be brought before the ruling council for trial.
As such, the game is one part giant war between the two sides, and one part courtroom drama. Other than Karda Nui, every location in the Matoran Universe may be visited, and canonical characters may appear briefly.
Courtroom drama ought to be exciting.
Name: Should be Bionicle sounding.
Species/Element: Include species (Toa, Matoran, Turaga, Skakdi, Makuta, Rakshi, Axonn's species etc.) and element, if applicable. Did I read that right? Did you say Makuta?
Gender: Does not have to follow canon gender rules.
Alignment: Good/Neutral/Evil, Lawful/Neutral/Chaotic. Whether you are lawful or not plays a key role in this game, particularly if you're good.
Allegiance: If you're in a Toa Team, or the Order of Mata Nui, or the Dark Hunters, or some other group, list it here.
Equipment: Weapons and Kanohi, if applicable.
Powers: Innate powers. (Examples: Makuta powers, elemental powers, Voya Nui Matoran abilities.) What Voya Nui Matoran abilities? They were normal Matoran... And you're letting us play as Makuta? The most OP race ever other than Botar?
Appearance: Colors, size.
Biography: Write a short backstory describing your character's life up until now.
Personality: Write down some notes about your character's personality. This is as much for your own sake as for other's.
All in all, this is a good idea.