YOU SAID:

I guess the cat's out of the bag

INTO JAPANESE

私は猫が袋から出て行っていると思う

BACK INTO ENGLISH

I think the cat is going out of the bag

INTO JAPANESE

私は猫が袋から出て行くと思う

BACK INTO ENGLISH

I think the cat goes out of the bag.

INTO JAPANESE

猫はかばんから出ると思う。

BACK INTO ENGLISH

I think the cat comes out of the bag.

INTO JAPANESE

猫はかばんから出てくると思います。

BACK INTO ENGLISH

I think the cat comes out of the bag.