"Positives changes on the cards" — meaning?
Solution 1:
The headline is not correct. In English, the plural of (a) positive change is - positive changes
That is, the adjective does not take a "plural" form to modify a plural noun (in other languages, such as Spanish, it would, but not in English.)
As for "on the cards": Initially, this struck me as odd—the common AmE idiom is in the cards (meaning something presumably will happen in future—or is predicted to happen). However, I have since been informed that "on the cards" is the usual idiomatic way to say this in BrE.