Characters from one show take a vacation... and run into characters from another show.
Needs Examples, Rolling Updates, Do We Have This One?? So, you have two shows that you really want to Cross Over, but there's a problem - they live half-way around the world from each-other. What to do? A common solution is for the characters of one work to visit the city where another work is set for some leisure time (for example, vacation, concert, sporting event, movie premiere), and just happen to run into each other. See also In the Past, Everyone Will Be Famous for when time-traveling vacationists just happen to run into historical figures.