At this age, kids don't like moving or change very much. I would try to get his schedule as close as possible to his old one and constantly reassure him. Is he allowed a cuddle or special item at school? If he could take something with him it might help. There is a little book I would read to him about a kiss in the hand, but I forget what it is titled sorry.
My sons were that way, so if I knew ahead of time before the move I would get them ready by talking about it.
In the morning, when you wake up and as he is getting ready mention how much fun school is going to be today. Mention this several times in a happy voice. Ask, what the best part of school is and that you cannot wait to hear how his day went.
After school, ask him about his day. They may not say very much, but keep asking. Apparently with boys, they talk better when occupied, so try tossing around the ball when asking.
At bedtime, remind him that he had a good day at school and another day to have fun is coming.
I hope this will help, but I am sure there will be others with good advice.