The TV series officially ended after 5 seasons. There is no "Season 15" for this show.
Since "Season 15" doesn't exist, you should look for the Gotham: The Complete Series BluRay collection. A high-quality digital repack of this set usually includes: gotham season 15 complete bluray 720p repack
Pros:
Watch Bruce Wayne evolve from a grieving son into Gotham’s protector. or technical codec details (like x264 vs x265) for this post? The TV series officially ended after 5 seasons
Visual Quality: Despite the show's dark and gritty aesthetic, the 1080p transfer (superior to 720p repacks) features punchy, vibrant colors—especially the iconic greens and purples of the villains . Black levels are deep and "sumptuous," though some "crush" (loss of detail in shadows) occasionally appears due to the show's high-contrast style . gotham season 15 complete bluray 720p repack