The Upside down

There's something lurking in the shadows of avengers tower. An unknown creature that only peter can sense. It's dangers are unknown to the avengers, as well as the history Peter shares with it.

* Since the multiverse and different dimensions is canon in the Marvel comics, cartoons and now the MCU, as well as the awesome Netflix original Stranger Things, I thought I'd combine the two.
Let me know what you guys think of the idea.