It's not a slam dunk that JD will be the nominee. Marco Rubio and others are looking as good, if not better.
While the war is at the top of the list right now, by 2028 its importance will have dropped.
The thing most clear now is that whoever the nominee is, the main Republican strength will REMAIN the insanity and anti-American-ness of the Democrats. How they fucked up the climate debate, how they have brought an invasion of third-world, government-dependent wretches and are fighting for THEIR rights vis a vis those of AMERICANS, environmental and regulatory insanity, gender confusion, and so on.
One can only hope (and expect?) that the D's will nominate some crazy bastard like AOC, to seal the deal.