Q really could be a future human.
All Good Things or his dialogue with Riker could be interpreted that way.
Or they just once were very much like humans in their mentality.
But anyhow I doubt about the Prophets being future Bajorans. I thought about it, too, but they don't understand enough about corporal beings or linear time that I could believe they once were corporal or lived in linear time.
Maybe the Prophets anyhow influenced the Bajoran existence resp. evolution with their Wormhole or their crystals and therefore feel anyhow responsible for their 'creation'.
And if tyrants take me, And throw me in prison, My thoughts will burst free, Like blossoms in season.
Foundations will crumble, The structure will tumble, And free men will cry:
Thoughts are free!