Just a short reply before I need to go to school !
The very nice J-8V is simply a nice "What-if" made by a very talented artist known as "LEGO", whoch posted several of updated versions from existing aircraft as well as complete speculative projects ... sadly he once dissappeared silently !
Regarding the overall more than interesting J-16 - J-19 speculation ranging from loud "wild-guesses" from some fan-boy to more than sceptical "not-real" posts by others.
IMO honestly I don’t think that there are so many types "out there" in some secret hangars (even if I won't mind if so
) as listed and several of them are listed twice. Additionally I don't think that there are too many developments around based on "older" models like a "Silent Flanker" or the JH-7B based on the standard Flounder. As such IMO the J-16 is simply – as Huitong suggests – what we expected the J-11BS to be, a Chinese Su-30MKK-equivalent. The JH-7B – and here I really don’t understand why it is still called JH-7B – is a completely new design similar to the model or that very fine CG we’ve seen.
Regarding the numbers 17 - 19 again I’m still very skeptical if this J-17 “Silent Flanker”, J-18 “Snowy Owl” and J-19 or whatever are real and IMO they are in most cases the wildest possibilities of fan-boys dreams or at best concepts under consideration or fall-back options if the real projects were unsuccessful. Anyway I agree that – similar to Sukhoi, where each new “version” received a new type designation – SAC tried to do its best with the Flanker-design and its failed XXJ-concept. Maybe if the J-20 would fail or if it couldn’t be afforded in that large numbers, so another less-complex type could be a solution.
Therefore this – and IMO most likely option – is the following scenario:
The PLAAF has / had actually three different requirements … the XXJ (as a heavy weight fifth generation fighter), the JH-XX (as a stealthy JH-7-successor and H-6-supplement) and – IMO not yet defined – a type with multirole and carrier capabilities. To all the SAC issued their proposals ... as well as CAC and maybe (at least for the second one) even XAC.
The first one (sometimes called J-19) was lost by SAC to CAC with the now famous J-20, the second one is reportedly a large stealthy fighter-bomber type (funny, sometimes also called J-19) and the third one … I don’t know, but IMO it would make the most sense to develop a maybe slightly smaller, lighter multi-role type like the Super-Hornet in size maybe based on the studies for the XXJ or Flanker derivates, which could both complement the J-20 and J-10 (maybe as dedicated J-8-succssor) and J-11 for the PLAAF but also J-15 for the PLANAF.
As such one type, three versions … three designations !
And now back to You, what to You think ?
Besides that I won't be disappointed if it would look like that !