The difference of time between GTA: CW (2009) and GTA V (2013) is four years.
The difference of time between 2013 and now is four years.
GTA V was made until 2015 not 2013 (and so, released DLCs and such...)
Rockstar said in 2016 that was holding a meeting and then said that development has already begun.
This is less than 1 year, not 4 years.
By my count (which I've been thinking about for some time) I believe will have a trailer in 2019, or at most 2020, and so released in 2020/2021.
This. I really hope that RDR2 will not be pushed back (But then again,GTA V was also delayed several months so it wouldn't be impossible...).
It is happening, just not now. Rockstar is putting their focus in RDR2 most likely. I'd begin expecting an official word from them about the next GTA at least a year or more after RDR2's release (which I believe will get pushed back to 2018).
Also , if I'm not mistaken CTW was developed by Rockstar Leeds (the studio tgat develops the handheld GTA games) and it is (kind of) a spin off. The last main series game to be released was IV in 2008. I believe that the reason we don't have an official statement yet (aside from RDR2) is GTA Online as the community is pretty active and rockstar gets a whole lot of money from the people who buy the shark cards...
You guys know that GTA V/VI is made by Rockstar North and RDR2 by Rockstar Studios, right?
Rockstar Studios is a collaborative effort between Rockstar Vancouver, Rockstar London, Rockstar Toronto, Rockstar New England, Rockstar San Diego, Rockstar Leeds, and Rockstar North.
It's difficult a game delay another. Each subsidiary has its focus, and the north is the GTA series.