The theory that the Altaean colony and Honerva are working together to create the mech that we saw at the end of season 7 is my favourite Voltron theory.
Imagine that Altaean waking up and Allura being there ready to help him as she assumes that he has been placed in that mech against his will only to have him realise who she is and then look at her with great hostility and hatred.
Then he tells her that he chose to do this of his own free will, that it was a great honour to be deemed worthy of and that his task was to defeat them and he is greatly disappointed that he failed to avenge Lotor's death.
The paladins then learn that Honerva took the colonists away and believing that she has manipulated them the paladins and Romelle take the Altaean back to the colony so that Romelle can tell them about what she discovered about Lotor and the second colony and to defeat Honerva. However when they reach the colony they learn that not only do the Altaeans now know about the second colony they actually know the whole story and it is very different than what Romelle, Keith and Krolia assumed it to be.
The Altaeans blame the paladins for Lotor's death and see Romelle as a traitor and question the paladins actions at the end of season 6 and point out that all the death and destruction that has happened in the last few years wouldn't have happened had they chosen to hear Lotor out. Imagine all of this coming from Honerva, who has not manipulated them, only told them the truth. Also, the Altaeans, for their own safety have not entered the war as they do not have any army to protect themselves with and the mech or mechs are new and they do not want to lose any more of their people to this war.
Imagine Lotor returning and the Altaeans being overjoyed and protective of him when he sees the paladins again. Imagine him trying to convince them to to trust the paladins which they do very reluctantly but they let then know that they don't trust them and if any of them make any move to harm Lotor then they will kill them.
Imagine the paladins being seen as the enemy not by the Galra but by Altaeans and how it will force them to confront and question themselves, their views and their actions in a way that they have never been made to before.










