My gut feeling is that India will go for :
F 35 : 35-40 aircraft in the late 2020s to early 2030s. Lots of EU countries may back out due to Trump and GCAP availability by the mid 2030s.
Su 30 MKI : Upgraded variants (260 + 12 new orders) + tentatively 40 more as proposed by HAL previously upto early 2030s
Tejas MK1A : (83 + 97) Point defense, Trainer, CAP, A2G upto early 2030s
Tejas MK2 : 120-180 aircraft to replace all Mig 29s and Mirage 2000s by early to mid 2030s
AMCA : 40 aircraft in early 2030s to 80-100 by late 2030s closing off at around 200 aircraft by 2040.
Rafale : Possible order of 36 more by late 2020s to early 2030s to secure production line and spares and prevent another Mirage 2000.
AHCA/FXX (6th generation) : 20-30 aircraft (prototypes and LSP variants) by late 2030a to early 2040s.