I remember Prabhupada writing that one attains Brahma Nirvana as soon as they go back to Godhead. I see this happening as one returning directly to their constitutional position as they re-enter the stream of Eternity, and in this case "Brahma Nirvana" is God's direct will and them following it at all times. They would also get Eternal Krishna Prema as well, full Love of Krishna, never to fall back down again into the material world, as Prabhupada has said once someone puts their hand into the fire of the material world, then goes back to Godhead, they do not put it in a second time because they are intelligent.
As for those that are not fully fallen from Godhead but are simply captivated by the glow of the material effulgence, but can still fall, why it it that they are not given the same provisions as someone who goes back to Godhead never to fall again? I know Krishna especially works to retrieve His fallen devotees, but I would like this question answered from what anyone here thinks, because as it is said in the Bhagavad Gita, once one returns to Krishna's abode, they never fall back into this miserable world ever again. Yet there is repeated birth and death, and children are born from the Spiritual World. And when an adult becomes a demon or someone who does not follow the rules of God, they fall, and then have to return to Godhead. That's what our movement is for, bringing back the fallen and spreading Krishna Consciousness. It is difficult for many demons to achieve liberation, even though they all eventually do, because they cannot take another birth until they go back to Godhead. There are no evil babies. Let me know what you think.