Accoring to
this report Ryanair plans to triple it's fleet of 737-800s in the next 5-10 years.
According to MOL:
"Over the next 5-10 years we will double and treble the size of our fleet of 737-800s. We will only compete in those markets where we can fill 737-800s and the smaller markets we will leave to somebody else, and the bigger markets we will leave to somebody else"