The toa empire timeline was very interesting angle and place to visit; a dark future where tuyet won out in her battle with lhikan and became a despot ruler, crushing the dark hunter & brotherhood of makuta and turning most of the toa into iron-fisted tyrants. Last we saw of this world, takanuva arrived and helped start a rebellion; tuyet was poised to flee to another reality and start again as the matoran and other species rose up and closed in on her base. She gets cut in half by the portal for her troubles and takanuva goes on his merry way.
I always thought it would be interesting to see what events unfolded in this reality after that point. My personal canon events are…
-the uprising won, but it was a very long, hard fight against the toa and their powers. Those toa that lived would likely be stripped of their masks and imprisoned.
-I imagine that either pohatu or lesovikk would be chosen as a new leader, as both were the most active in resisting tuyet.
-teridax would likely quickly fall to his usual schemes, either in a more subtly political way or the more open evil overlord way of the main reality. Either way, I feel like he’d eventually become the new threat to the matoran universe, but a much more cautious, slow-building one as he no longer had the brotherhood to back him.
-speaking of which, I imagine krika, who’d have never mutated into his insect form, earnestly breaking from teridax and joining as a leader amongst the new leadership.
-I figure as all had suffered equally under the toa, there would easily be stronger connections and unity between the matoran and other races.
-as the toa were considered dishonorable and distained now, I imagine matoran would train to be better warriors as they are, maybe developing new weapons, and shun the idea/chance to be toa going forward.
-There are also two entities in this reality that we’d yet to see; the order of mata nui; it seems weird they would not have become involved, hell helryx seems like she would have been down to join the empire. Also mata nui himself, who never fell to sleep here and so how was he cool with and never intervened in any way?
So those are just my personal ideas on how the events of theat reality may have continued to play out. How do others imagine they would?