Crusader, the argument isn't that acquiring Pixar was the only way Disney could resuscitate its Feature Animation division. With plenty of effort and money, changing attitudes and the passage of time it's certainly possible that Iger (if he had the desire) could have attracted and developed the talent necessary to build back Disney's animation reputation.
The argument, rather, is that Disney had gotten itself into a situation such that the Street was forcing Iger's hand. Iger needed to get at least a distribution deal with Pixar, or he likely would not have the time to do anything at Disney, let alone the multi-year project which turning around the animation division would be.
Disney needed Pixar a lot more than Pixar needed Disney. The worst thing Pixar was going to get was a "George Lucas-type distribution deal" (read your own source). That ain't bad.
Faced with that prospect, Iger was forced to consider the acquisition, and paying big bucks for it.
I've never understood how you think Dreamworks was so far ahead of the game, and forced Jobs' hand. Dreamworks SKG (live action films) was sold to Paramount/Viacom for $1.6 billion. In connection with that deal, DWA (whose stock price has been flat, and has a market cap of less than $2.8 billion and a P/E of under 12) got a distribution deal with Paramount. That took Paramount off the table for Pixar, but freed up Universal as a possible distributor.
You also thought it was significant that one of Dreamworks' founders was left in charge of DWA.
Meanwhile, Pixar just got sold for $6.4 billion, net of Pixar's cash (please note,the figure I gave above for what Jobs received is net of that cash), with a P/E of 40, leaving Jobs on the Disney board, Catmull in charge of Pixar AND Disney Feature Animation, Lasseter with greenlight authority over all Disney animation, and Pixar continuing to operate out of its current HQ with just "Pixar" (not "Disney") on the front gate.
And Jobs got played again how?
The timing has nothing to do with Dreamworks, and everything to do with Iger taking over the Company and responding to the demands of the Street.
As far as shopping for sources, in addition to reading many news stories and analyses, I listed to the investor's conference call announcing the merger, and I've read the merger agreement, Jobs' voting agreement, and the Board policies which Pixar dictated.