Joss Weadon likes to tease us. Not like a hot girl that isbteasing but has every intention of going home with you at last call. No, Joss teases like a mean spirited 13 year old. Heres what I mean, in a recent interview (and im paraphrasing) Joss said Thanos was always intended to be the main monster behind the scenes. To be the Ultimate evil. Why is that a tease? Bevause it lets us know that yesbtheynhave grand plans for the Mad Titan but theres more. Im a firm believer that we are getting a version of the Infinity Gauntlet. Atleast an Infinity type story line. But, amd here is Marvels cruel genius. Thats not the ONLY huge story they are building. Step back and do a roll call of the characters, good and bad, that we know are on earth in the MCU....
Cap, War Machine, Black Widow, Hawkeye, Falcon
Iron Man,
Hulk,
Winter Soldier
Ant Man (coming)
Dr. Strange (coming)
Blavk Panther (im POSITIVE hes coming)
Quick Silver
Scarlet Witch
The Abomination
The Leader
Those are just the ones that spring to mind. There one or two more im sure I missed. Thats 17 right there not to mention the minor Heros and Baddies that will be introduced on Agents of Shield and future earth based MCU movies. In 4 years there could easily be 40 to 50 powered characters in the MCU. Why does this matter? Agent Maria Hill set the stage in the very first episode of Agents of Shield.
Unregistered.
She expressed concern about unregistered, powered people. This firmly sets the ground work for Civil War. One of the undercurrents of AoS, one of the purposes it serves, is to set up the characters and the stage for a Civil War event. Remember, Marvel is planning till atleast 2021. Thats 7 years of set up. More then enough for Thanos and Civil War story's to develop in the MCU.