When Marvel Studios and Sony Pictures teamed up to allow Spider-Man to appear in the Marvel Cinematic Universe, part of that deal was an animated Spider-Man movie delivered by Sony Pictures.
The animated Spider-Man film from Phil Lord and Chris Miller now has an official release date of December 21, 2018. The movie was originally announced for the summer of 2018.
Lord and Miller will produce and write the animated Spider-Man movie but will most likely pass on directing as their next project is the (still untitled) Han Solo movie.
The live-action Spider-Man movie is set for a July 28, 2017 release and Marvel's Spider-Man will make his debut in Captain America: Civil War on May 6, 2017.
The animated Spider-Man will co-exist with Tom Holland's portrayal of Peter Parker in those films.