The prediction was that the 14th Amendment challenges to keeping Donald Trump off the ballot would (1) be taken up by the U.S. Supreme Court and (2) result in a substantive ruling clarifying how the 14th Amendment applies in this context.

Both parts occurred:

1. Supreme Court took the case – The Court granted certiorari in Trump v. Anderson (No. 23‑719), which involved Colorado’s decision to bar Trump from the 2024 presidential primary ballot under Section 3 of the 14th Amendment. Cert was granted January 5, 2024, oral argument was held February 8, 2024, and the case was decided March 4, 2024. (law.cornell.edu)

2. Substantive ruling clarifying application of Section 3 – In a unanimous per curiam opinion issued March 4, 2024, the Court held that only Congress, not the states, may enforce Section 3 of the 14th Amendment against federal candidates and officeholders, and that states therefore may not exclude such candidates (including presidential candidates) from the ballot under Section 3 absent congressional authorization. This clarified who has enforcement authority under Section 3 and how that clause operates with respect to ballot access for federal offices. (en.wikipedia.org)

Because the Court both took up the issue and issued a substantive, clarifying opinion on how Section 3 of the 14th Amendment applies to efforts to bar Trump from the ballot, the prediction is right.