이 되겠군

would be

→ 이

phrase Rare #26,145

would be Expresses a speaker’s expectation or realization that something will be or become a certain thing. The ending 군 gives it a conversational, reflective tone.

KO: 그건 좋은 경험이 되겠군.

EN: That would be a good experience.

힘든 여행이 되겠군

It sounds like it’s going to be a difficult journey.

— 패신저 57 (1992)

그럼 내 밥이 되겠군.

Then you'll be my dinner.

— 프레데터: 죽음의 땅 (2025)