The Supreme Court will decide the ballot case for Trump. But they will not do it on substantive grounds — that is, they will not hold that Trump is not an insurrectionist, or that Trump is not an “officer” of the United States, and they will not hold that keeping Trump off of the Colorado presidential primary ballot is anti-democratic or unconstitutional.
Instead, they will decide on jurisdictional grounds — that the Colorado state courts did not have jurisdiction to decide the question of ballot access because eligibility under the 14th Amendment is a federal eligibility question that could only properly have been submitted to a federal court for resolution. As such, the answer to the question presented (did the Colorado Supreme Court err in keeping Trump off of the primary ballot) would be yes.
This is convenient in a number of respects. First, the US Supreme Court avoids the politically-charged question of whether Trump is an insurrectionist, or whether he is subject to the 14th Amendment. Second, and more importantly, it resets the entire case to Square One, with no resolution practically possible before the November election, which is an outcome the radical right majority on the Court undoubtedly approves. (It also would act to avoid the appearance of corruption by Thomas, who insisted on participating in the oral argument.)
Should be an interesting — and likely quick — decision.