I don't know if you guys noticed but it seems that Huitong is more confident now that the J-16 exists. He updated his J-11BS entry saying that the speculation that it would be used as a fighter bomber was incorrect. At the top of the page he added information about the J-16. I will be a tandem seater, based on the J-11BS but with improvements. It seems it will be the successor to the JH-7 as a fighter bomber.
But he doesn't suggest that it will be in the same class as the F-15SE, instead, that will come later (J-17, J-19?)
I think the supposed JH-7B was canceled long ago.