Thanos, The Mad Titan, is the current big bad of the Marvel Cinematic Universe. We know that he is gathering the Infinity Stones. Their comics counterpart can be placed into ths Infinity Gauntlet and be used for complete domination of reality. It can be assumed that this is the goal of the movie version of Thanos as well. But that’s the thing…we know next to nothing about Thanos. I have already made my statements clear that I think Marvel Studios has tripped with their handling of the character. He has only made three appearances so far, his introduction in The Avengers, a small role in Guardians of the Galaxy where he was disrespected by an underling and the last in Avengers: Age of Ultron where he made a lackluster after credits appearance.
Avengers: Infinity War is due to drop in 2018 so in 2017 Marvel Studios should really build up his threat. James Gunn, the writer/director of Guardians of the Galaxy and its sequel has said that Thanos will not be appearing in Vol. 2. He also made the same statements about its predecessor but weeks before the movie was released, it was announced Josh Brolin would be appearing in the movie as Thanos. It’s an open secret that the Guardians will be in Infinity War so something has to bring them to the conflict. Gamora and Nebula are both the daughters (kidnapped children) of Thanos and Drax has a personal vendetta against him. The Guardians also know where one of the Infinity Stones is stored at.
Thor: Ragnarok is probably the most important movie linking to Infinity War. At the end of Age of Ultron, Thor set out to figure out who was behind the gathering of the Infinity Stones. It is also widely believed that the final Stone, the Soul Stone, will play a role in the movie. Loki, currently masquerading as Odin, also has access to the Tesseract aka the Space Stone. Loki was also loaned the Mind Stone (it is still up in the air if he knew that info) in The Avengers to find the Tesseract but failed. So he might have to return a favor to be back in Thanos’ good graces.
Thanos has not been announced for any of these movies. But as with his other appearances, they can be uncredited. Since Thanos is a motion capture character, it would not require a lot to get Josh Brolin in for a day or two to do the role. But it is time to see Thanos actually do something. The most action we have deen is him sitting in his chair and putting on a gauntlet. We have seen characters refer to him as the most powerful character in the universe but that has not been conveyed. Most of his underlings including both of his daughters have outright betrayed him. Ronan the Accuser outright dissed him and yet no retaliation.
One of the biggest criticisms towards the MCU is how the villains are one note. Marvel Studios can really build up the threat of Thanos before his big opening in Avengers: Infinity War. They don’t really have to be much. Just small cameos in Guardians Vol. 2 and Ragnarok to show he is coming for what he covets and is not messing around anymore. There would be something really unfortunate if the big bad for the MCU turned out to be a dud.