No way Stanton doesn't opt out after yr 6. He'll be 31, just in time for his last big contract. Further, I wouldn't be surprised if this contract isn't heavily back-loaded, despite the $25 mil AAV. Fuggin Loria doesn't spend money unless he has to. The real amount he gives Stanton will be nowhere near $325 mil, IMO.
On a different note, I bet Heyward leads off for StL. They already talked about getting Marp in the 3 hole, but they didn't have someone servicable to replace his spot in the lineup.
ETA:
<blockquote class="twitter-tweet" lang="en"><p>If Stanton opts out of contract after 2020, his AAV for first 6 years would be "only" $17.83 million, sources say <a href="http://t.co/WQoV0TxMMK">http://t.co/WQoV0TxMMK</a></p>— Jayson Stark (@jaysonst) <a href="https://twitter.com/jaysonst/status/534775626042183680">November 18, 2014</a></blockquote>
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So, yeah, heavy, heavy backload. Still a shit-load of cabbage, tho'.