Spider-Man/Peter Parker will be appearing in Captain America:Civil War and we believe that they haven't approached anyone yet, but we do know that it will not be Andrew Garfield. I have a lot of people in mind that could be Spider-Man, so here they are...
Brenton is 25 years old and is an Aussie actor. We know him from the movie The Giver,Maleficent and Ride. Kevin Feige announced that Spider-Man would be a teenager in Captain America:Civil War. I think that the make up artists can just fix Brenton and make him look like a teenager.
We met Dylan O'Brien on the famous tv show on MTV Teen Wolf, The Internship, The Maze Runner and The First Time. Again Spider-Man would be a teenager in Civil War but O'Brien is 23 years old (younger than Brenton).
I heavily consider Timothy as Spider-Man, and he is only 20 years old! We know him from Interstellar and Men,Women and Children. Timothy is a young actor who looks like Peter Parker!
Jake is 20 years old (older than Timothy) we know him from Wizards of Waverly Place the series and the movie, he is also in the movie New Years Eve.
Who is best to play Peter Parker?
If there would be another Spider-Man with a different cast here is my other cast considerations
I believe that Cameron could play Peter Parker's best friend Harry Osborn or he could be the bully in school Flash. Cameron is 21 years old and stars in the same movie with Brenton Thwaites (The Giver) He also played young Joker in the hit series Gotham.
Skandar is a English actor and is 23 years old.He is in all of the Narnia movies. I think his body build and his looks make him Harry Osborn.
Who could play Harry Osborn?
Mary Jane Watson
Zoey is 21 years old and is known for the movies Vampire Academy and Beautiful Creatures. I think Zoey could be a great cast for Mary Jane if Timothy Chalamet or Dylan O'Brien were a cast.
Olivia Cooke is 21 years old and is best known for the movies Ouija, The Quiet Ones, The Signal, Me Earl and the Dying Girl, and the series Bates Motel. She would be great with any of the 4 boys.
Who is best to play Mary Jane?
From all of my considerations I would definitely pick Timothy Chalamet as Peter Parker, Olivia Cooke as Mary Jane, and Cameron Monaghan as Harry Osborn.