After reading some of these fanfics I want to see someone make this were the mane 6 and spike get launched with other universe to meet each other and learn from each other life lessons.
Here are some of the universe I wouldn't mind seeing meet
The spike tragic stories by dante24
The girls of my life duality by wildcard25
Harem king and legion by wildcard25
Maximum overlord,Dragonlance and dragon kin by underrated drake

It would be amazing firm each other to learn about there diffrent relationships how diffrent each ithers worlds are and even how they may be the same people but live diffrent lives and relationships