I do think that the SCOTUS is more likely to take a walk on this challenge just to avoid making a decision that would be effective nationwide. Colorado is small beans; now, if states like Michigan and Ohio decide to render a challenge, then it gets interesting because there will be huge pressure on the SCOTUS to act.
Personally, though? My impression is that Democrats don't GAF about Trumpster 's qualification to run. They need him in to scare the Left into submission.