What if team Voltron winds up going to another reality (maybe including Lotor and/or Matt). And then the other dimension paladins approach to investigate our paladins’ arrival…their hearts stop.
They see Our!Keith and cry out his name, their voices almost cracking just a bit. They immediately rush to him, hugging him, near tearing up or downright crying, telling him how much they love him, how much they missed him.
It’s once one of our paladins tells them that he came with them or they notice Keith happened to stiffen up at their embrace, that they let him go…only to beg to hold him for just a little longer. And that is when our paladins learn that in this reality, Keith actually sacrificed himself before Lotor had intervened. Possibly learning that this damn near happened in their own dimension, too.