I was pinged about this about one-hundred different ways, but in case you missed it there was a huge announcement on The Mothership yesterday. The long and short of it, is that Standard is reverting from the new 18 month rotation back to the two year rotation.
This announcement will apply to the current Standard legal sets, meaning that Amonkhet will not cause Battle for Zendikar to rotate out of Standard. In other words, get used to this guy.
I was personally enjoying the new rotation system, though many players felt like it made Standard rotate too much, and made the format feel less accessible to less enfranchised players. It certainly made it more expensive to have a deck on week one or two of every new Standard format.
This will impact investment strategies with regard to the current sets, and you can expect this to be expanded upon on the Insider side. Shadows Over Innistrad positions certainly have gotten more interesting.