So 2 and a half years and 3 years respectively. If this is going to be Canon's one and only top Pro body I cant believe they will wait 4 years to refresh it, that's an age in product turnover particularly in the electronics industry.
In fact 9 months could be an age too! ;-)
So if they don't release the 1D X soon, they will need to release the next generation in a short time. Finally, the competitors will not wait to take the next step.
With all due respect, what are you talking about? Please refer to the timelines of both Canon's and Nikon's flagship camera releases for time period it takes for updating those cameras. It's getting more and more spaced out, not less.
Not sure if you were referring to my statement on the timescales or Emilio's, if you were referring to mine then I am merely using dates announcement dates which are published on DP Review to show what the update frequencies have been for previous Canon Pro Models. This was in relation to a previous answer which stated it could be 4 years to the next version of the 1Dx which in my opinion is not a duration Canon would opt for.
1Dx, 7D, 24-105, 70-200 IS II, 16-35 II, 100mm Macro IS, 85mm F1.2L II, 24mm F2.8 IS, 18-200, Sigma 1.4x, Canon 2x iii, 430EXII, 600EX- RT, ST-E3 Fuji x100s and X-T1