WordNet sense 1 (expected to become or be; in prospect):

potential, expected

WordNet sense 2 (showing possibility of achievement or excellence):

promising

WordNet sense 3 (apparently destined):

probable

WordNet sense 4 (at risk of or subject to experiencing something usually unpleasant):

liable

WordNet sense 5 (capable of being believed):

credible

WordNet sense 6 (with considerable certainty; without much doubt):

probably, belike, in all likelihood, in all probability