1. What are we going to talk about?

2. What will we talk about?
3. What shall we talk about?
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does #1 mean #2 or #3?
Does #1 mean that we had already a topic beforehand and we want to talk about it today? Does #1 mean that we decided to talk about a topic before?

1 answer

All 3 questions mean the same thing.

Without context, it’s hard to say if the topic of discussion is already known or if the discussion will be whatever people feel like discussing at the time.