I'm not a big 6" figure fan myself, but I friggin' called that a 6" line wouldn't shock me as a bit of a "reboot" to GIJ going forward, while they hash out what they want to do with the line at all. I was met with tons of "You're wrong, it's gone, it's dead, they should sell it to someone else who will do it right for us!" type remarks... Sound familiar? Sounds like Star Wars collectors, hehe.

I brought up the movie's staying power, etc., and was met with ticket sales which means jack in the toy aisle ultimately.
I felt like a soothsayer with the call because then the 6" rumor cropped up pretty soon after then... It makes sense because of the way Star Wars is going, which (arguably) is more popular and has a more devoted collector-base... I still think Star Wars is destined for no 4" collector-focused figures. Or maybe Star Wars is just lingering longer because they paid for it and GIJ is in-house, I dunno.
Anyway I tried making the argument about the 12" SS figures seemingly hanging on too, but yeah... Oh well. Who knows what GIJ's future is? Except I don't think it's dead. I think it fell prey to Hasbro's upcoming juggling act as they deal with this onslaught of movie properties from Marvel, DC, Star Wars... I think GIJ is (mostly) on this "hiatus" because manufacturing resources in China are going to be geared at those properties for the foreseeable future and it'll be steady. I think if GIJ had a film coming, they'd get their fingers in the pie too, to some degree.
I'm not sure it'd have a 4" presence, but maybe. Star Wars still does, so who knows.