DISCLAIMER FOR DISCLAIMER: I really didn't want to do this but because of some experience doing these things..... I just got to.
DISCLAIMER: This is not real. This will never end up on actual film. These are my personal choices for the cast of a YOUNG JUSTICE film, so be kind and enjoy.
Superboy
Tyler Hoechlin
Superboy is the sixteen-week-old clone of Superman created by Project Cadmus. Although he does not have all of Superman's abilities, he has super strength, super high jump, invulnerability, enhanced hearing,[33] and later: infrared vision. Superboy is typically sullen, ill-tempered, and hates being told what to do. With special "shields" (patches that look like Superman's sigil) created by Lex, Superboy can suppress his human DNA to gain full access to his Kryptonian abilities; however, this comes at the cost of increased anger and heavy loss of rationality.
Hoechlin is of course most known for his role in the MTV show TEEN WOLF, and for a little while being rumored to be the new Batman. Hoechlin in a complete badass and a beast, he's completely massive. He's only 25, and with a good shave I could totally see him as the clone of Superman.
Robin
Tye Sheridan
Dick Grayson, the thirteen-year-old adopted son of Batman is known as Robin, and acts as team leader when Aqualad is unable to.Grayson does not possess any superpowers, however, he is an excellent hand-to-hand combatant, tactician, and a technological genius.
Sheridan is a 17 yr old who could be seen in the fantastic films MUD, and TREE OF LIFE. He's a really great young actor who I have no problem seeing as a 16-17 yr old robin.
Aqualad
John Boyega
Kaldur'ahm (or "Kaldur" for short) is the sixteen-year-old leader of the team. He displays super strength, durability, as well as the ability to breathe and speak underwater, typical of Atlanteans. He also possesses the ability to form hard water constructs through the use of his Atlantean water bearers and to generate electricity,
John Boyega is a 21 yr old British actor, who like everyone else I first saw in ATTACK THE BLOCK. He really impressed me in that film, and in looking for someone to play Aqualad, there was no one else I could see in the role, the kid looks like a leader.
Red Arrow
Alex Pettyfer
Red Arrow, the adopted son of Green Arrow, is the team's male archer. Like Robin and Artemis, he has no superpowers, but is very skilled with a bow and arrow. Originally Speedy, he left Green Arrow's side in "Independence Day" when he was told he was becoming an official Justice League member when he was still being treated as a sidekick, and adopted the alias "Red Arrow".
Pettyfer sets off a lot division on this site, a lot us either love him or hate him, but I for one think he's a really solid actor. While Roy is a very complicated and heroic character, let's admit it, he's kind of a dick at times. I can really see Pettyfer pulling this off, the guy who wants what he wants and act like an asshole when he doesn't get it, but at the end of the day will always do the right thing.
Kid Flash
Colin Ford
Kid Flash is the team's sixteen-year-old speedster. He has enhanced speed, although he has not fully mastered his abilities, and does not demonstrate the range of abilities that his mentor The Flash does. Wally and Dick Grayson know each other outside the team, extending to knowing each other's secret identities.
Colin Ford is a young actor whom some might recognize as young Sam Winchester from SUPERNATURAL or from his current role in UNDER THE DOME. I really dig this kid, I do. He's a really cool and funny guy, who has this very happy go lucky way about him and who I would want as Wally west. I know he would kill it in this role.
Zattana
Zoey Deutch
The daughter of Justice League member Zatara, Zattana has magical powers, whose spells are spoken in reverse.
Deutch is a 19 yr old actress who was most recently seen(by some of us) in the film VAMPIRE ACADEMY. While I found the movie to be a horrible mess, I found Deutch to be the saving grace. She was funny and charming, and to be frank, SEXY AS HELL! I think she would make an excellent teenaged Zattana.
Miss Martian
Hailee Steinfeld
Miss Martian is Martian Manhunter's teenaged (by Martian standards, though she is 45 in earth years) niece,[20] as well as being an inexperienced superhero. As a Martian, she has telekinesis, telepathy, and flight. Additionally, she can shape-shift to a limited extent. She has stated that she cannot become intangible as her uncle can, implying that this is an advanced skill.She is kind and optimistic, but has a naive streak born of having learned about life on Earth through television shows.
Steinfeld is a wonderful young actress who of course is known from the films TRUE GRIT, and ENDER'S GAME along with others. Steinfeld has quickly become one of my favorite female actresses, she's knows how to play a strong character, but also has this unique vulnerability to her.
Artemis
Saoirse Ronan
Artemis was the team's fifteen-year-old archer. Like Robin, she has no superpowers, but is very skilled with a bow and arrow. She is introduced as Green Arrow's "niece" but it is later revealed she is the daughter of the villain Sportsmaster and the now paraplegic ex-villain Huntress, as well as the sister of Cheshire.
Ronan is an American born Irish Actress who is known from film like THE LOVELY BONES, HANA, THE HOST ,ETC. Ronan is an academy award winner in the making, I guarantee it, watching her is like watching a young Cate Blanchette, she is so talented. There was no one else I thought of for the role of Artemis, she would OWN it.