In regards to the upcoming NAB 2015, here's a nugget from Canon Rumors:
Unfortunately, I think this is completely accurate. While the C300 Mark II should only cost $8K, like the Sony FS7, I'm guessing it'll cost closer to $10K or even $12K (or $16K as announced on April 8). Reason being: I don't think Canon believes the FS7 to be a competitor to this camera. I can see why Canon would believe this, but in the marketplace the consumer sees these two cameras as in the same class, even if the manufacturers do not.
I think this line of reasoning is further supported if you look at Canon's current price breakdown pyramid for their Cinema EOS lineup (current mark down pricing is listed below):
Canon C100 Mark 1 - $2,999 (link)
Canon C100 Mark II - $5,499 (link)
Canon C300 Mark I - $6,999 (link)
Canon C300 Mark II - $15,999 (link) - updated after Canon announcement
Canon C500 Mark I - $15,999 (link)
Canon C500 Mark II - $19,999 or $24,999 (speculative)
I also wouldn't be surprised for Canon to pull a page out of Apple's iPhone playbook and continue to sell the previous version of their Cinema EOS camera at a reduced price. That would allow Canon to sell a Cinema EOS camera at nearly every price point. And if there's one thing that Canon (and Apple) is good at it's providing a product offering at nearly every conceivable price point (specs are different story!). If the product pyramid that I've outlined above holds that would allow Canon to sell a camera as inexpensively as $3K and as premium as $25K.
Additionally, if you're in the market for a great 1080p camera the original C100's and C300's are absolute steals at those prices. Since 98% of projects today (2015) are finished and presented in HD 1080i/p, those cameras will still get the job done well for the next several years. I have no intention of giving my EOS cameras up at this point, and may even add an additional one soon!