20 puzzling movie sequel recastings explained

"Vegas Vacation"The National Lampoon "Vacation" franchise featured new kids every few years.When it comes to building franchises, Hollywood tries desperately to stay consistent. If the first movie is a hit, studios will try their hardest to keep the same directors and actors on board as long as possible.

But there are instances when a change must be made. Sometimes for the betterment of a movie, but sometimes the change leaves viewers scratching their heads.

From "Batman" to The National Lampoon "Vacation" franchise, check out the most notable re-castings in movie history.