Is there going to be a fifth Twilight saga?

No there will not. There wont even be a fifth twilight book. Stephanie Myer (the author of twilight) was going to make a book in Edwards point of view, called "Midnight Sun" but will not because someone hacked into her account and posted most of the chapters on her blog. if you would like to read most of the chapters go onto

www.stephaniemyer.com and there will be the chapters, enjoy!