Avengers: Infinity War - 10 Things That Must Happen In Part 1

10. The Last Two Infinity Stones Must Be Introduced

So far, the Marvel Cinematic Universe has shown audiences just four out of six Infinity Stones: The Tesseract in Captain America: The First Avenger, Loki's Gem in The Avengers, which was confirmed to be an Infinity Stone in The Avengers: Age of Ultron, The Aether in Thor: The Dark World and - yes - The Orb in Guardians Of The Galaxy. Of course, the MCU hasn't done a particularly good job explaining the Infinity Stones or building an interesting mythology around their existence. Which is a shame, because it hasn't made things all that exciting for their inevitable coming together. Not to mention the fact that Thanos - as to be played by Josh Brolin - is relatively cardboard at the moment. Still, there's no Infinity War without all six stones, so expect the last two to find themselves introduced towards the beginning of the first part. Which leads to...