If Apple cares about their Softbank investment, the best possible outcome is that Intel copies their IP wholesale. Arm's white whale is Intel buying an architectural license, which they have zero incentive to do unless someone gives them an off-the-shelf core design that doesn't suck.
The modern Cortex and Infiniverse designs are so pathetic that RISC-V might mature by the time ARM is the industry standard. And the smaller ARM IP hasn't been profitable since China mass-produced the clones. Courting Intel into buying an architectural license with a free IP bonus is a legitimately smart move for ARM's longevity, from Apple's POV.
The modern Cortex and Infiniverse designs are so pathetic that RISC-V might mature by the time ARM is the industry standard. And the smaller ARM IP hasn't been profitable since China mass-produced the clones. Courting Intel into buying an architectural license with a free IP bonus is a legitimately smart move for ARM's longevity, from Apple's POV.