Friends was just a massive show, one of the best shows ever. It seems like every few years there is a rumor for a reunion episode, or movie. But the cast has even said, it will never happen. 

Thanks to the YouTube channel / user Smasher, we get an idea of what a Friends reunion trailer would look like. 

Considering this trailer is a mash up of all the former Friends cast shows they've all done after Friends (Joey, Cougartown etc) it is amazing.