없겠군

there probably isn't, there probably won't be, must be, could hardly be better

→ 없다
없 not have, be without; be absent, not exist + 겠 future tense + 군 Exclamatory ending expressing realization or mild surprise
adjective · future tense Rare #22,369
there probably isn't, there probably won't be The ending -겠군 expresses a conclusion or realization, often with a sense of “I see” or “I guess.”
KO: 오늘은 시간이 없겠군.
EN: I guess there won't be any time today.
must be, could hardly be better In expressions such as 장관이 따로 없겠군, 없겠군 means that nothing could compare; the phrase is often emphatic.
KO: 이보다 좋은 선물은 없겠군.
EN: There could hardly be a better gift than this.
Forms of 없다

난 어림도 없겠군

I wouldn’t stand a chance.

— 원스 어폰 어 타임 인… 할리우드 (2019)

다신 볼 일 없겠군

I guess we'll never see each other again.

— 쿵푸 허슬 (2004)