The phrase "be in store for" generally means that something is about to happen or is planned for the future. There are various synonyms that can be used to convey the same meaning. Some of them include, "awaiting," which implies the expectation of something in the future, "upcoming," which means something is about to happen, "impending," which suggests that an event is looming and likely to occur soon, and "anticipated," conveys a sense of excitement and expectancy. Other synonyms for "be in store for" include "going to happen," "destined for," and "scheduled." Overall, these synonyms convey the same sense of anticipation and expectancy for something that is about to happen.