Su-57

The PAK-FA is a fifth-generation fighter aircraft currently under development by Sukhoi. Estimated to be released to the weapons market in 2015, the PAK FA is intended to the the successor of the MiG-29 and Su-27 Flanker.

Ace Combat: Assault Horizon
An [http://FC2 posthttp://shikuziri.blog15.fc2.com/ FC2 blog post] by Namco Bandai front man Kazutoki Kono confirms the presence of the PAK-FA in the upcoming Ace Combat: Assault Horizon.

"「いやー、このタイミングでロシアが第5世代戦闘機の実機映像を出してくれて助かったわー」by Project Aces 戦闘機制作チーム."

- Original quote

Translated, the paragraph alludes to "a Russian fifth-generation fighter."

"Well, ow helped me out a real picture of Russia's fifth generation fighter aircraft in this time"by Project Aces team fighter production."

- Rough translation