Short answers, pulled from the story.
Final Fantasy X/X-2 HD Remaster was first announced at the Tokyo Game Show in 2011. The project was intended to commemorate the tenth anniversary of the original game but faced development delays as the team worked on Final Fantasy XIII.
Square Enix developed Final Fantasy X/X-2 HD Remaster with significant contributions from the Chinese studio Virtuos. Producer Yoshinori Kitase led the reunion of the original development team and voice cast to ensure the project preserved the soul of the original games.
The remaster introduced a new audio drama titled Final Fantasy X: Will which served as a direct sequel to the events of X-2. The drama featured characters Chuami and Kurgum alongside returning characters like Tidus and Yuna to investigate a mysterious phenomenon known as the Beckoning.
Final Fantasy X/X-2 HD Remaster was released on Windows via Steam on May 12 one year after the PlayStation 4 port. The PC version includes 4K support, 5 game boosters, 3 parameter changes, audio volume options, the option to skip FMVs, and an auto-save feature.
The PlayStation 3 and Vita versions of Final Fantasy X/X-2 HD Remaster sold 185,918 and 149,132 copies respectively during its first week in Japan. The total sales for both versions in the first week exceeded 339,000 copies in Japan.
Square Enix has not confirmed a sequel to Final Fantasy X despite speculation sparked by the audio drama Final Fantasy X: Will. Director Motomu Toriyama expressed interest in returning to the world of Spira after finishing Final Fantasy VII Remake while writer Kazushige Nojima has a story written for a potential sequel.