how long before

I'm pretty sure im not the only one who has noticed that warmane's release dates and time between new content on lordaeron have been extremely similar to blizzard's back in the days of wrath, i.e., expansion release date : 13 of november, lordaeron started back in september 15th 2015 and northrend along with naxxramas/OS/EOE and pretty much everything 1st season of WOTLK included came around 2 months later, roughly the middle of november.

On retail, ulduar was released back in mid april, 2009
Lordaeron has seen the release of ulduar in april 26th 2016 if im not mistaken

Trial of the Crusader was released back in mid august 2009 on retail
On lord we've seen TOC being released in late september

Icecrown Citadel was released back in december 8th 2009, just a bit under 4 months between TOC release and ICC release and with this comes my question. Seeing as how we've had TOC for almost 2 months now, can we expect to see ICC released anytime soon? Somewhere around late january or perhaps early february?

Id guess February

As first, I think for sure they are not going to release ICC until ToGC25HC is done on 5/5 (or Insanity), which itself will take some time.
After 5/5 (or Insanity) is done, they will keep it for some time, like they did on UD (like 1-2 months maybe).

At this point, Anub´arak on 25 heroic is unkillable cos of his HP (enrage).
After they reduce his HP and they fix https://www.warmane.com/bugtracker/report/34622 Anub will fall.

So I expect:
Untill December anub should be possibly fixed.
Until new year anubs HP should be reduced and he will be dead.
Untill February ICC will be released.
ICC release also depends on if (and yes then how) they want to buff ICC (which is nonsense anyway I supose).
So, expect 2-3 months untill ICC release, but for sure, not sooner than January, not later then March-April.