The title and subtitle were successfully replaced, as provided in the prompt.

Prompt: Replace the poster title “NEON ORBIT” with exactly “ECHO VECTOR”. Replace the subtitle “THE LAST CITY ABOVE EARTH” with exactly “A SIGNAL FROM THE EDGE OF TIME”. Preserve the astronaut, orbital city, artwork, composition, colors, title position, subtitle position and overall typography style. The new text must be clearly readable and correctly spelled. Do not add any other text.