There are many kinds of reunion, like family, clan, school, team,town, friends etc. But since we get old and someday have to report to our Creator we do not know if we will reunite with our loved ones, friends, relatives, classmates etc.
Let us ask if there is eternal reunion. ?It will only happen if people has eternal life. So again let us ask how can we have eternal life ?
I believe all religion teach that there is life after death except for some who believe that when we die we no longer exist.
But consider this,most people whose life has been the basis of the particular religion are all dead and their bones are still on the grave except Jesus Christ who rose from the dead.
If Jesus Christ rose from the dead then He has eternal life. Then if He has eternal life then also those who follow Him. Are we following Jesus ?
The Bible declares that the power that raise Jesus from the dead will also raise us who believe in Jesus. I believe it , do you ?