I always liked the idea of multiple game universes coming together into one big universe. so Link could send out a Magikarp, Mario could summon a Persona, etc. Then some idiots stole the idea from me.
What the heck is a "Wreck-It-Ralph" anyway?
Uhh, but seriously, I always wanted to make some sorta story where it's modern technology mixed with fantasy ideas. Having some trouble with magic homework or whatever? Check Google. In the middle of a fight with a dragon and you need to play some music or something to calm it down? "Siri, play playlist 23: Good-er songs for sleep." It's been done before, but a lot of the times they act like separate worlds, where my idea would sorta blend the two together.