7 page article, but well worth the read, with lots of juicy insidery gossip about Bush family drama:
http://nymag.com/news/politics/elections-2012/jeb-bush-2012-10/On George and Barbara's favoritism for Jeb re: the two sons running for governor of FL and TX in 1994:
It also sounds like HW's health is pretty bad. Doesn't sound like there's much chance of him making it to 2016.
But crucially, there's this bit about one reason why Jeb didn't run in 2012, which might prevent him from running in 2016 as well: