Ultron Revolution
In season 3, Ultron returns after his apparent demise and seeks revenge on the Avengers. The Avengers must defeat him as well as new threats like Baron Zemo's Masters of Evil and Kang the Conqueror. Vision, Black Panther, Captain Marvel, Ms. Marvel, and the Inhumans are also introduced.
Episodes
1 Adapting to Change Mar 13, 2016 
2 The Ultimates Mar 20, 2016 
3 Saving Captain Rogers Mar 27, 2016 
4 Under Siege Apr 3, 2016 
5 The Thunderbolts Apr 10, 2016 
6 Thunderbolts Revealed Apr 17, 2016 
7 Into the Dark Dimension Apr 24, 2016 
8 Dehulked May 1, 2016 
9 Inhumans Among Us Jul 24, 2016 
10 The Inhuman Condition Jul 31, 2016 
11 The Kids Are Alright Aug 7, 2016 
12 The Conqueror Aug 14, 2016 
13 Into The Future Aug 21, 2016 
14 Seeing Double Aug 28, 2016 
15 A Friend in Need Sep 10, 2016 
16 Captain Marvel Sep 18, 2016 
17 Panther's Rage Sep 25, 2016 
18 Ant-Man Makes It Big Oct 2, 2016 
19 The House of Zemo Oct 9, 2016 
20 U-Foes Nov 6, 2016 
21 Building the Perfect Weapon Nov 13, 2016 
22 World War Hulk Nov 20, 2016 
23 Civil War (1): The Fall of Attilan May 15, 2017 
24 Civil War (2): The Mighty Avengers May 16, 2017 
25 Civil War (3): The Drums of War May 17, 2017 
26 Civil War (4): Avengers Revolution May 18, 2017