As we all know, Marvel Studios has their own flavor, so they don't line up with the comics. I am completely fine with that. I say let movies be movies and let comics be comics. I recently got into comics, so I haven't read that many yet. Two of which, I will discuss. I think Marvel Studios could totally make it happen.
Next Avengers: Heroes of Tomorrow
Now for this to fit in the MCU, I say we should see a new super heroine. A daughter of Tony Stark and Pepper Pots to add to this roster. I already came up with one. I named her Stephanie Virginia Stark/Iron Star. Her story is that she was born with some kind of heart disease. Only way for her to stay alive is to have an arc reactor in her chest. She gets her name Iron Star because she makes her own suit of armor and it is gold in color and the shape of the reactor is a star. I think that would be cool.
Search: Young Avengers Fan Casting and Steven Fleckner's article will come up. Also search: Young Avengers. It will be the first one to come up, Jared Ficiur's article. Good reads. I'll give you their origins.
Patriot: A young black teen named Elijah 'Eli' Bradley. He has multiple origins. The one the MCU should go with is the one where he is in a car accident and Steve Rogers donates blood to him if they don't come up with their own. Patriot now has the super soldier serum in him. I think for a MCU original, he should have family ties to Falcon. (I say that because Steve ain't gon donate to some random kid). It won't be a crime for Marvel to say that Sam Wilson is asked to take care of his nephew because he was causing trouble at his old home and by superhero cliche he is in an accident and only Steve's blood can save him.
Iron Lad: Kang the Conquer goes back in time to see his younger self. Long story short, his younger self travels back in time by stealing the Conqueror's tech an makes armor similar to Iron Man's, afraid of becoming the evil Kang the Conqueror. He seeks the Avengers, but they are disassembled so he formed the Young Avengers. I do not know however, why he is called Nathaniel Richards when he is not related to Reed or Sue Richards. I don't see Marvel changing this much, should they put him in the movies.
Stature: She is Scott Lang's daughter. She is a little girl in Ant-Man and it's set to hit theaters next July. I truly think Marvel could be heading this way. However, Cassie's powers are similar to Hank Pym's. Her father just stole the suit and used it, Cassie actually has the Pym particles in her system. Marvel so far has left her origin untouched.
Hawkeye: A girl named Katherine Bishop was sexually assaulted after her sister's wedding. She at first was too traumatized to go on. Then she decided that training herself in martial arts would help her in the future. She also happened to be good at archery. She utilizes Black Widow's, Mockingbird's and Hawkeye's gear. I think that could change in the MCU. I don't think the Avengers will be completely disassembled while this team is formed in the MCU. Therefore she'll change her name from Hawkeye to something else maybe.
Hulkling: No, he is not a child of the Hulk. He is a Kree/Skrull hybrid and he resembles the Hulk. Being half Skrull, he has their shapeshifting ability. If I am not mistaken, Marvel does not have rights to the Skrulls so either make him a Kree/Xandarian hybrid or something completely new.
Speed and Wiccan: Twin sons of Scarlet Witch and Vision. Speed is meant to resemble Quicksilver and Wiccan resembles Scarlet Witch. Wiccan is a spitting image of his mother. No difference in their powers. His costume will change most likely as Scarlet Witch's did as well.
I haven't read this comic either unfortunately. Basically, the Avengers start an academy to train young heroes who have dangerous powers into valuable heroes.
West Coast Avengers
West Coast Avengers only lasted for four issues and that was in the '80s. Many of those heroes are like z-class. People only care bout Mockingbird, War Machine and Hawkeye for that. Hear me out. The rumors said that a new team of Avengers will be assembled at the end of Avengers: Age of Ultron. Everyone assumed that Cap would do it. Who's to say that Hawkeye won't form the this team? We have Mockingbird for Agents of S.H.I.E.L.D. and we already have War Machine.
After the events of Age of Ultron, the team splits up to achieve goals. Vision suggests that he, [Hawkeye](movie:1070822), Quicksilver, Scarlet Witch, War Machine and Mockingbird head to the West Coast. Iron Man flies off to space to retrieve the Hulk and runs into the GOTG along the way. Ms. Marvel accompanies him. Cap and Falcon resume their search for Bucky. Black Widow goes back to a new S.H.I.E.L.D. With Black Panther, idk. He and Cap are close. Ehh I feel like I'm pushing it if I suggest he be in Cap 3. Before this happens, they all decide to start the Avengers Academy and the blueprints are lying on the table in Avengers Tower. End credit scene should be one of the Young Avengers kids watching the news. Idk bout Next Avengers. Maybe have them as next generation heroes? I think post [The Avengers 3](movie:738027).