buddha came to this world to teach prestine dhamma path. those who work little will go to heaven. others who have completed reach NIBBANA. and in very few suttas, you will fin that buddha has given discourses about DEVAS and their life span and facilities..etc. but it does nt mean that he came to send people to heaven or Brahma world. everyone cannot understand this dhamma. so he must have adviced those people to go to higher realms rather than going down to hell. please visit the following link. you can download the PDF.