I was surfing on the internet and found out some good stuff about the unreleased heroes in Dota 2. It looks like they started to make concept art of heroes that have been recently added to DotA (Arc and Ember).
More info bellow
Arc Warden and Ember Spirit only have a concept art picture. They don't have a minimap icon, spell icons, subtitles, etc.. But I suggest that they will be added when the time comes.
As for Legion Commander, he has potential to be added when the International 2013 finishes (11.08.).
A post that I saw back in the days said that by the end of the year there will be added 4 heroes: Abbadon, Legion Commander, Pheonix and Soul Keeper. Although there aren't any picture leaks of Pheonix and Soul Keeper they might be added because they are old DotA heroes...
As I mentioned here are pictures of the new heroes...
Ability Particle Effects:
Turns the enemies numbers against them, dealing damage and granting you bonus movement speed per unit. Deals bonus damage to illusions and summoned units as a percent of their current health.
Removes debuffs and disables from the target friendly unit, and grants bonus attack speed and health regen for a short time.
When attacked, Legion Commander has a chance to immediately attack again with bonus lifesteal.
Legion Commander and the target enemy hero are forced to attack each other for a short duration. Neither hero can use items or abilities. If either hero dies during the duration, the hero winning the Duel gains permanent bonus damage.
This was uploaded by Tomarzig, but as I said before this doesn't mean that its fake... I think that i will be the left one
*Only concept art :(
This was also uploaded by Tomarzig. I think that the second one will be Ember because he looks like Storm Spirit with his hat.
*Only concept art :(
Too bad that all of these heroes just have a concept art. Hope to see more pictures of them and their abilities. This was uploaded by DSnacks8035. He doesn't resemble Soul Keeper from DotA, but ok.
If you are interested in reading more go visit the Dota 2 Wiki, there you have more infos on their Lores, abilities, etc..
Because Legion Commander is almost finished, you can add him to the game by editing your |activelist.txt to include "npc_dota_hero_legion_commander" "1"| and than you can select him and put him on your profile.
|Go submit your E-mail on the Home page to the right|
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Thanks to HTML_Earth for helping me with the Legion Commander code
Images taken from Dota2Wiki and Cyborgmatt.com