Neptune and R27 ?
highly unlikely...
Since we also have some agreements with Kongsberg for its NSM, I guess it's not too far off that the top brass at Kemhan and TNI decide to switch to them for our shore defense AShM. Now about the A2A missiles for our Sukhoi fighters, I don't really like the R27 except the IR guided version since it still uses semi-active radar homing. So if they'll have to cancel the Ukraine deal for R27 SARH, more power to them.
It does seem, however, that cancelling Su-35 is actually the right move for us no matter what the deniers said. Since Russia is now seen as an aggressor, it will only make it harder for us if we continue the deal with them.
In my opinion, The current higher ups in TNI and KEMHAN is quite adequate and proper.
That's my impression as well. Hope for the best that this will continue from now on.
Anyway, regarding the war in Ukraine right now, I'm worried that this will turn uglier if a certain country up North decide to also stir the pot in and around our frontyard at LNU.