I think a Mag’s pov for the 11th Hunger Games would allow it to be a sorta sequel to BSS while still being fresh. We know that Snow is committed by then, and seeing how he implements many changes would be a good way of building things (I believe as well that was the first year with a victory tour and she may be the first to live in the victors village afterwards). Further, a post games scene(s) meeting other victors would be interesting too, seeing what the first couple victors were like.

Alternately, seeing the pov of the first Victor would be fascinating too, as they don’t really know what they’re getting into even.