According to Osho, once samadhi is truly seedless, rebirth is impossible; there is no karmic 'seed' left to sprout another life. Earlier promises to 'come again' were compassionate devices, tailored to disciples’ immaturity, to keep them motivated. Now he says plainly: don’t postpone—accelerate your practice while he is here; when truth ripens, the skillful lies are dropped.
If all inner seeds are burned in samadhi, there’s nothing to be born from; Osho once said he’d return to keep you trying, but the real point is: don’t wait—practice now.