Early this month, NMC did take over MCC according to the new structuring of policies. Regarding NEXT replacing NEET UG and FMGE, only time can tell. There has been no official information regarding this and there has been no hint of such moves. FMGE is for Candidates who have studied abroad to practise in India. And NEXT is the admission mode for MD/MS Courses. And so it is unlikely that NEXT will take over these.