Looking a couple steps forward:
Suitably expanding the dimension and capacity plus an additional non-AB WS-9 onto this UCAV - We could actually be looking at a slightly/moderately smaller, subsonic version of JH-7A as a generic/conventional, unmanned missile truck platform for standoff strike missions.
The potential is huge with such UCAVs to supplement if not eventually succeed the JH-7s, while also complementing the J-16s in similar roles.
I think if one was to add an additional non AB WS-9 onto this UAV would really require such a major redesign of this UAV (literally doubling the available thrust), that it would be an entirely different aircraft.
Also, if one wanted a subsonic UAV oriented for the strike mission, you'd probably end up with an aircraft that is potentially bigger than a JH-7/A in takeoff weight (certainly dimensions).
A twin non AB WS-9 subsonic strike or armed UCAV would really be better off with a flying wing planform rather than a generic MALE planform.
I also don't think there's any particular need to relate this UAV (or indeed, any other UCAV) with JH-7/A, whether if it's a UCAV oriented for the strike role, or whether it is powered by a non AB WS-9 or not (for example, non AB WS-13E/21 or non AB WS-10, etc would all equally be viable).
Probably better to view any medium to heavy weight strike UCAV on their own merits.