Should I wait to by an iPad?

Sam has an iPad 3 and he's about to upgrade to the iPad Air 2, but he's concerned that they will announce a new version within a few months. Leo says that nobody really knows when Apple will announce a new product. But Leo says that since Apple has released the iPad Air 2 just last October, there's a good chance that Sam is safe for at least a year. Leo does have a hunch that there may be a larger iPad Pro coming this summer, however.