How can we re-create the Movie event minigames in our servers?

Hi, I have played the Movie event on Bedrock, and quite liked the minigames, such as defending against the waves of piglins who are attacking the game, delivering the ores in the mining quests, and the payload cart etc. I was thinking it'd be cool if we could somewhat recreate these on our Java servers. Delivering ores could probably be easy, just using Quests plugin. Maybe for the Piglin event, could also use the Quests plugin, and maybe get it to somehow spawn piglin npcs that target the gate? But IDK how to make them target and damage a gate. Could maybe hide a npc that they attack and call it gate? I have no idea how to do the payload cart. Perhaps commission a plugin that lets you set up an object that follows a path, get someone to make a cart model using resource pack. Any ideas and suggestions? Perhaps we could brainstorm here.