Ce sera vs Ça va être

Bonjour Andrea,

 

The whole story is set in a near future context. All the proposed actions within the text are in this context.

So yes, one could write "Ce sera un festin extraordinaire" but this doesn't translate from the text "It's going to be an extraordinary feast!".

This is how I see it  --  hope it helps.

Bonne Journée

Jim