From these images we can assume that DotA 2 is based on a dark theme but the graphics are amazing and everything is so easy to differentiate and adopt unlike other DotA genre games. The in-game UI of DotA 2 looks very sleek and minimap is much detailed. Valve has added Dota 2 mana bars for allied heroes.
The 2nd image of Shadowfiend confirms the DotA 2 Tutorial mode with a guiding arrow. The user interface of DotA 2 is designed for consuming less space making the gameplay screen much wider. Valve hasn’t officially disclosed any updates about these leaked screenshots but we thank to people who leaked this much awaited pictures!
Update: Another image of DotA 2 Vengeful Screenshot at Radiant Fountain with other hero Icons:
The Mighty Roshan
DotA 2 Dire (Scourge) Secret Shop with Naga Siren
DotA 2 Hero Selection Screen showing total 42 Dire vs Radiant heroes
DotA 2 Key Binding/Remapping Screen