There are several synonyms for the phrase "is going to" which can be used to add variety and interest to your writing. One popular alternative is "will," which is often used in formal writing and suggests a more definitive, certain future outcome. Other options include "intends to," which suggests a planned action in the near future, or "is set to," which implies that something is already in motion and will happen soon. "Plans to," "expects to," "anticipates," and "predicts" are also useful synonyms that can be used to great effect in a variety of contexts. By varying your word choice, you can make your writing more engaging and expressive.