Because this was one of the first issues that Marvel Comics released set in the aftermath of Secret Wars – their first ever gigantic comic book crossover event that began in the spring of 1984 – and featured Spider-Man returning to Earth following his major cosmic battle with other popular Marvel heroes and villains.
What you see there is the cover of Spider-Man #252, which actually sports a story titled “Homecoming.”
Because of this, Homecoming would have been a perfectly fitting name for Spider-Man 2… but I suppose they’ll just have to go a different route.