Most of the information currently known is based on speculation, leaked information, and leaked photos via employees and the president at RED. The raven will most likely feature a fixed mount, which fans are speculating will be an EF mount. From the above picture it is likely that the Raven will take mini-mags for media storage.
Based on announcements from other companies, fans are guessing that the Raven will come at a price point of under $10,000 (body only) and will be replacing SCARLET MX. More information will be released on Friday during the official announcement, but until then, speculation will have to get your fix.