Here are mine, at least for now:
Phase II:
--Iron Man 3--Obviously, this will involve The Iron Patriot, Aldrich Killian, and The Mandarin.
--Thor: The Dark World--Obviously, here we will see Thor have to fight King Malekith, who may be armed with one of the Infinity Gems (Loki may have had another one of them in his sceptor). Loki will have to help Thor and King Odin gather the Asgardian army and save Thor's human friends on Earth before King Malekith gets to them. Thor possibly brings Jane up to Asgard.
--Captain America: The Winter Soldier--I think the villain here will be Dr. Arnim Zola, with Crossbones and The Winter Soldier as his henchmen. Winter Soldier has to get killed off by Captain America in a final battle. Cap will then find a new love interest.
--Guardians of the Galaxy--My guess is they'll have to fight Thanos in this one, who is on a quest to find the Gems.
--The Avengers 2--The Guardians and the Avengers have to join forces to take on Thanos, who has gone back in time and stolen the Guantlet from King Odin and is coming closer and closer to getting all six of the Infinity Gems. Nick Fury will get killed off, but then the Avengers and Guardians will manage to defeat Thanos in a climactic battle, just as he is about to find the last gem. Ant-Man will make a cameo as a small character.
Phase III:
--Ant-Man--I think the old Ant-Man will be fleshed out here, building Ultron and having to face a key adversary such as Whirlwind. He then names his future successor, and Wasp is introduced.
--Thor 3--I think King Surtur will be the main villain here, killing off King Odin and possibly Loki, with the Enchantress introduced as a side villain trying to seduce Thor. Thor and Jane get married, and Thor becomes King of Asgard.
--Captain America 3--My guess is that Baron Zemo will be the primary antagonist here.
--Nick Fury--This will go back and pay tribute to Fury's life and roots, along with explaining the formation of SHIELD.
--Black Panther--This will be an explanation for his background, and will introduce him to the Avengers squad.
--Dr. Strange--He'll probably get introduced, having to combat Dormammu.
Finally, I think there's two possibilities for the final Avengers film or films:
****POSSIBILITY 1:
--The Avengers #3: Part 1--The Masters of Evil are formed to fight the
Avengers, led either by a very wounded and weakened Thanos or by Ultron. The Avengers come together to combat them. Another key member is killed off at the end, perhaps Hawkeye or even Captain America
--The Avengers #3: Part 2--The Masters of Evil gather up for a final battle. The Avengers defeat them.
****POSSIBILITY 2:
--The Avengers #3: Ultron, having been built to be a jack-of-all-trades hero to eventually replace the Avengers once they're too old, will begin to believe that humans are evil, and so he decides to start building up a massive army of clone robots. He kills Captain America or Iron Man, resulting in the Avengers rallying on their comrade's behalf to stop Ultron from destroying all of humanity.
Phase II:
--Iron Man 3--Obviously, this will involve The Iron Patriot, Aldrich Killian, and The Mandarin.
--Thor: The Dark World--Obviously, here we will see Thor have to fight King Malekith, who may be armed with one of the Infinity Gems (Loki may have had another one of them in his sceptor). Loki will have to help Thor and King Odin gather the Asgardian army and save Thor's human friends on Earth before King Malekith gets to them. Thor possibly brings Jane up to Asgard.
--Captain America: The Winter Soldier--I think the villain here will be Dr. Arnim Zola, with Crossbones and The Winter Soldier as his henchmen. Winter Soldier has to get killed off by Captain America in a final battle. Cap will then find a new love interest.
--Guardians of the Galaxy--My guess is they'll have to fight Thanos in this one, who is on a quest to find the Gems.
--The Avengers 2--The Guardians and the Avengers have to join forces to take on Thanos, who has gone back in time and stolen the Guantlet from King Odin and is coming closer and closer to getting all six of the Infinity Gems. Nick Fury will get killed off, but then the Avengers and Guardians will manage to defeat Thanos in a climactic battle, just as he is about to find the last gem. Ant-Man will make a cameo as a small character.
Phase III:
--Ant-Man--I think the old Ant-Man will be fleshed out here, building Ultron and having to face a key adversary such as Whirlwind. He then names his future successor, and Wasp is introduced.
--Thor 3--I think King Surtur will be the main villain here, killing off King Odin and possibly Loki, with the Enchantress introduced as a side villain trying to seduce Thor. Thor and Jane get married, and Thor becomes King of Asgard.
--Captain America 3--My guess is that Baron Zemo will be the primary antagonist here.
--Nick Fury--This will go back and pay tribute to Fury's life and roots, along with explaining the formation of SHIELD.
--Black Panther--This will be an explanation for his background, and will introduce him to the Avengers squad.
--Dr. Strange--He'll probably get introduced, having to combat Dormammu.
Finally, I think there's two possibilities for the final Avengers film or films:
****POSSIBILITY 1:
--The Avengers #3: Part 1--The Masters of Evil are formed to fight the
Avengers, led either by a very wounded and weakened Thanos or by Ultron. The Avengers come together to combat them. Another key member is killed off at the end, perhaps Hawkeye or even Captain America
--The Avengers #3: Part 2--The Masters of Evil gather up for a final battle. The Avengers defeat them.
****POSSIBILITY 2:
--The Avengers #3: Ultron, having been built to be a jack-of-all-trades hero to eventually replace the Avengers once they're too old, will begin to believe that humans are evil, and so he decides to start building up a massive army of clone robots. He kills Captain America or Iron Man, resulting in the Avengers rallying on their comrade's behalf to stop Ultron from destroying all of humanity.