NEET scores only will be considered for AIIMS and JIPMER admissions. There will be no merger of syllabus. NEET syallbus only will be followed. Only entrance exam changes have been announced as of now. Everything else remains the same. NTA has released the official syllabus for NEET 2020. It is based on 11th and 12th class Physics, Chemistry and Biology topics. You can check the complete syllabus at: https://medicine.careers360.com/articles/neet-syllabus