Have you seen "Avengers: Endgame" yet?
If not, make sure you watch these movies before you watch Endgame!
Okay, maybe you've already watched Endgame, that's fine, we can work with that as well... it won't hurt to watch these again and go to watch Avengers again!
Here's a list of movie:
Decimation | 0:26
The Big Six | 1:33
What time is it? | 2:19
The key to it all | 3:14
Avengers Disassembled | 4:08
Rescue to the rescue? | 5:15
A Cap with a cause | 6:11
An absentee Hulk | 7:28
Thor-mbreaker | 8:41
Ronin, we presume? | 9:51
The strongest Avenger | 10:36
Hide and seek | 11:33
The Guardians | 12:29
Strange business | 13:50
To the Infinity Stones and beyond | 15:03