In my headcannon, they meet the Pirades of the Carribean ones including Elizabeth Swann and help them. And Dysney ones from Tarzan, Ice Age, Brother Bear, Lion King, The Jungle Book, Dinosaur,m Encando, Pocahontas, and more join in. It rock if Tarzan and Jane use melee weapons instead of guns; including dao swords and kukri knives on the old-fashion sword/knife fights. And it rock to see the Dysney characters and the ponies sing songs. And to see the giant animals including the prehistoric ones join in the big fights.

This I wish to see.
It rock to see Rainbow and Zipp use dao swords as many on China, kukri knives as many on Nepal, nunchucks as many on Japan, bolas, knobkerrie clubs as many on Africa, recurved bows as many use on Mongolia and Persia as well as Egypt and China, and boomerangs. it also rock if Flurtershy use a knobkerrie club, archery and a kukri knife. And to see Pipp use a war fan as many on Japan.
It rock if Rainbow and Zipp were sparring to keep in practive and were eevenly match.; And a big way to show their sisterly bond.