[NOTE: Rebirth is instantaneous and without intermission. But the post-human rebirth as a subtle body being is here being mistaken for an "immortal soul" that survives death. In this simplified view, the radically impermanent and impersonal "person" (gandhabba, Five Aggregate combination) is judged. That is, some karma conditions the rebirth-linking consciousness. One then "enters" another relatively long-term existence in one of the six realms of the Sensual Sphere described by Mahayana as if that sphere were an exhaustive description of Buddhist cosmology's Three Spheres and 31 Planes of Existence.]
Padma Sambhava is considered to be one of the first persons to bring Buddhism to Tibet. The Bardo Thodol is a guide that is read aloud to the dead while they are in the state between death and rebirth in order for them to recognize the nature of their mind and attain liberation from the cycle of rebirth.
This is still a fairly attractive fate, for the Devas are the Gods (or angels), and their lokla is equivalent to the Christian heaven; however, the Buddhist teaching is that even heaven is not the highest spiritual objective, because it is still only a temporary state in the manifest universe.
[Actually these states are well within the cycle and are in no way outside of it unless the Sensual Sphere is regarded as the entire "world."] MORE pre-biblical messianic Judeo-Christian Vedic Brahmanism in the guise of "Buddhism"