It's hard to say for sure. It might be that they're facing unexpected setbacks, or they want to make sure it meets certain standards before release.
There could be a number of reasons. Maybe the team is striving for higher quality, or there could be challenges in coordinating the various aspects of the production like voice acting and music.
Maybe they want to make it perfect and take time for better storylines and animations.
The gap between Toy Story and Toy Story 2 was about four years.
Well, Toy Story was released in 1995 and Toy Story 3 came out in 2010. So, the time gap is 15 years. During that period, animation technology and storytelling in the industry evolved a lot.
The length of Toy Story 4 is around 1 hour and 40 minutes. It keeps you engaged throughout with its fun and emotional story.
I'm not sure exactly how long Toy Story 5 will be. It might vary depending on the final cut and production decisions.
Toy Story 4 lasts for around 100 minutes. It's a perfect length to enjoy the adventures of the beloved characters without feeling too short or too long.