I've been slowly, more completely integrating the characters of TFH into the world of MLP. So far I have complete ideas for three of the fighting six's origins, but the important part is somehow not swamping the story with too many characters, all with their own backstories, while evenly balancing the franchises of TFH, MLP and Undertale into one cohesive crossover story.
I don't think I have enough fingers to cross to make this work.