Let me up front in saying, this list is incomplete, and will likely always remain so. Marvel may not have locked down their Phase 1 scripts much, but by Phase 2, scripts were impossible to get hold of. The only reason there are more for Phase 3 is that by that point Marvel had sufficient faith in their writers to start submitting them for Academy awards.

But I wanted a complete list of all the movies, so I could plug the gaps when scripts appeared in the wild.

Phase 1

FilmU.S. release dateDirectorScreenwriter(s)
Iron ManMay 2, 2008Jon FavreauMark Fergus & Hawk Ostby and Art Marcum & Matt Holloway
The Incredible HulkJune 13, 2008Louis LeterrierZak Penn
Iron Man 2May 7, 2010Jon FavreauJustin Theroux
ThorMay 6, 2011Kenneth BranaghAshley Edward Miller & Zack Stentz and Don Payne
Captain America: The First AvengerJuly 22, 2011Joe JohnstonChristopher Markus & Stephen McFeely
Marvel’s The AvengersMay 4, 2012Joss WhedonJoss Whedon

Phase 2

FilmU.S. release dateDirector(s)Screenwriter(s)
Iron Man 3May 3, 2013Shane BlackDrew Pearce and Shane Black
Thor: The Dark WorldNovember 8, 2013Alan TaylorChristopher L. Yost and Christopher Markus & Stephen McFeely
Captain America: The Winter SoldierApril 4, 2014Anthony and Joe RussoChristopher Markus & Stephen McFeely
Guardians of the GalaxyAugust 1, 2014James GunnJames Gunn and Nicole Perlman
Avengers: Age of UltronMay 1, 2015Joss WhedonJoss Whedon
Ant-ManJuly 17, 2015Peyton ReedEdgar Wright & Joe Cornish and Adam McKay & Paul Rudd

Phase 3

FilmU.S. release dateDirector(s)Screenwriter(s)
Captain America: Civil WarMay 6, 2016Anthony and Joe RussoChristopher Markus & Stephen McFeely
Doctor StrangeNovember 4, 2016Scott DerricksonJon Spaihts and Scott Derrickson & C. Robert Cargill
Guardians of the Galaxy Vol. 2May 5, 2017James GunnJames Gunn
Spider-Man: HomecomingJuly 7, 2017Jon WattsJonathan Goldstein & John Francis Daley and Jon Watts & Christopher Ford and Chris McKenna & Erik Sommers
Thor: RagnarokNovember 3, 2017Taika WaititiEric Pearson and Craig Kyle & Christopher L. Yost
Black PantherFebruary 16, 2018Ryan CooglerRyan Coogler & Joe Robert Cole
Avengers: Infinity WarApril 27, 2018Anthony and Joe RussoChristopher Markus & Stephen McFeely
Ant-Man and the WaspJuly 6, 2018Peyton ReedChris McKenna & Erik Sommers and Paul Rudd, Andrew Barrer & Gabriel Ferrari
Captain MarvelMarch 8, 2019Anna Boden and Ryan FleckAnna Boden & Ryan Fleck & Geneva Robertson-Dworet
Avengers: EndgameApril 26, 2019Anthony and Joe RussoChristopher Markus & Stephen McFeely