Who would that be? Kevin Soros? Dean Cain? Kid Rock? Don Jr? There's no new celebrity waiting in the wings. Trump had been groomed for this since 1987. He was their only shot. With Orban out of the picture, and Trump out of the picture, the last 50 years of the Russian backed conservative movement will collapse and die. With Russia on the brink of collapse themselves (they are barely alive only because Trump removed oil sanctions against them, otherwise they'd be dead broke), it will take another few decades to rebuild, and the West will be watching closer this time.
MAGA didn't exist before Trump, and it won't exist after Trump. It simply doesn't exist without Trump.