Replacement of AIM-120 by LM ? - JATM

 Aviation week announced LM quietly develop the replacement of AIM-120; unfortunately there is no detailed information about this. 

https://aviationweek.com/defense/lockheed-quietly-developing-aim-260-counter-chinese-pl-15?NL=AW-05&Issue=AW-05_20190621_AW-05_809&sfvc4enews=42&cl=article_1&utm_rid=CPEN1000002744591&utm_campaign=20076&utm_medium=email&elq2=37b98bdd6e0449b2bb838c0b11f40608