The f 35a or any new model of it will never replace the typhoon.
They can go on about so called stealth till there blue in the face but if it can be beaten now using multiple pfr radar emitters then in 25 years time, a aircraft designed to reflect radar as the f35 is will be oppsed.
At the end of the day, all a AESA radar is either fixed (or in the case of Captor E a movable dish) with a mass of separate tx / rx modules which can be independently directed. There is nothing to stop it transmitting across a massive frequency spectrum to produce a incredibly detailed picture which would enable it to see a low observable object.
If it starts uses active deceptive jamming then the old adage stands that if transmits then it can be tracked and killed.
Also that big burner strapped to its arse would standout like a lighthouse to IRST kit even today never mind 25 years time.
It is far too slow and would loose any turning fight even today so on that front, its knackered too.
Uncle Vlad and his chums had the AESA radar on the MIG 31 working on 2 different frequencies (VL and higher) at the same time 10 years ago so in another 25 years, i'll leave that to your imagination.
Imo, I think we will be looking at a very fast, hyper manoeuvrable drone flown by some geek in a bunker somewhere via satellite for its replacement.
Now tell me what happens when these satellites get taken out or jammed

Back to square one me thinks