Hello.
So actually, nothing will rotate out of Standard. For more information, I would check this link (
http://magic.wizards.com/en/articles/archive/mm/metamorphosis). It explains how the format is changing, and it also shows what will rotate with what. The article lists Magic Origins as a core set, so keep that in mind.
Side note, only in Standard do things rotate out. Other formats, such as Modern, do not.
Now, for your deck. I think the mana is a bit off. Remove a
Plains and add a
Forest, see if it helps. You want the two pie charts to be as close as you they can.
Besides that, I think it is a solid deck. I think you should look into
Phalanx Leader. The adding a counter on each creature you control works great with some of your cards.
If you have any questions, be it about your deck, rotation, other formats, or anything, feel free to message me. I'll be happy to help.