To my knowledge, there isn't a shorter version of Toy Story 4. Usually, movies are released in their standard length for the theatrical and home viewing experience.
Could be that a short version didn't fit the story or marketing strategy. Making a short often requires a different approach and maybe this didn't work for Toy Story 4. Also, production costs and time could be factors.
At the moment, there's no official confirmation about Toy Story 5. But if the previous installments' success and fan demand persist, there might be a possibility in the future.
At the moment, there's no official confirmation about Toy Story 5. But if there's enough interest from fans and a great story to tell, it could happen in the future.
I don't think there will be a Toy Story 5. The series seems to have wrapped up nicely with the previous installments. But you never know what could happen in the world of movies!