In the 2017 WHO Malaria report, the WHO defines various goals for reduction of malaria burden worldwide. One of which is a 90% reduction, or more, in worldwide malaria mortality by 2030, compared with 2015 levels. (see p. 43 for current numbers, and trendlines. The "global" value is the relevant one here.)
Will this goal be realized?
The WHO publishes an annual report on malaria, in which they report on the previous year's mortality rate. This metric should be used to decide whether the goal has been reached.