http://www.cameraegg.org/canon-eos-5d-mark-iv-full-specs-and-images/
Well so we will have 4k30fps with DPAF. No 4k60fps and no 120fps in FHD. 8b 422 MJPEG 500mbps confirmed.
Only thing we do not know is CLOG or not and the crop in 4K.
On my side I do not know what to do:
GH5 with full video spec (4k60p, log, IBIS,..) but without DPAF which is essential to me + a D750 for stills
5DIV that does good stills and video but no IBIS and no 4k60p and log
Wait for