Not that likely... J-11A uses Su-27S avionic and modified from ED's model, so that saved tons of time for Deka. But Chinese version of Su-33? You could say that regarding J-15's position but not the lineage. China never had any product version of Su-33, only the prototype T-10K-3 and used its carrier specialized designs on J-11. I don't see that the development of J-15 will be easier than other significant evolved model in the Flanker family such as Su-30 or Su-35. Besides, PLA won't release any info of J-15 for DCS's reference...
About the Liaoning, markindel(2015) and topergood(recently) made two separate mods with new models of it, dunno if there is a chance for them to work with Deka and then officially add it into DCS as AI.
markindel's: https://forums.eagle.ru/showthread.php?t=156191
topergood's: https://forums.eagle.ru/showthread.php?t=205733