Question

1. He will go back to Geneva next year.
2. He will return to Geneva next year.
3. He is going to go back to Geneva next year.
4. He is going to go back to Geneva in ten years.
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Does #1 mean #2?
What about #3? Is #1 similar to #3? What is the difference?
'Be going to' is used for near future, isn't it?
Can we use 'is going to' as in #4?

Answer 1

Return and go back mean the same thing
One is also similar to three
Yes
Yes