If anybody is going to do it, it would be Sony.

The same company that jumped out in front with the NEX-VG10, then the FS100, and then the high frame rate FS700 that shook everything up could be stirring another big pot with a full frame camera that shoots 120 fps at 1080p.

Moreover, SonyAlphaRumors.com reports on potential specifications that include 1080p video at 50Mbps at 4:2:2 sampling, among other highly sought after video specs noted below.

Sony A99 Rumored Video Specs

1. AVCHD2.0 format ,below 1080p it have the Bit rate of 50Mbps, 4:2:2 sampling
2. 1080P with the highest 120fps,at 720P, the highest is 240FPS
3. MP4 format still 35Mbps
4. center focus all the lens can use the biggest Aperture. others still F3.5
5. except P model, A,S model can also auto-focus but M model still MF
6. 4 times zoom in during 1080P can be captured
7. multi-recording can take a 2.4Megapixels during recording
8. HDMI can be Non-destructive Output new shoe can fit the wireless(bluetooth) mic
9. except the high speed model,other model Maximum recording time is 29min 59s
10. Time code support

That reads more like a wish list than an actual spec sheet for a DSLR-style camera.  But if anyone would drop this in a sub-$5k DSLR, Sony would.  Expect lots more noise from Sony in the lead-up to Photokina 2012.