YOU SAID:
The best revenge is massive success.
INTO JAPANESE
最高の復讐は大成功です。
BACK INTO ENGLISH
Best revenge is a great success.
INTO JAPANESE
その映画は大成功だった。
BACK INTO ENGLISH
The film was a great success.
INTO JAPANESE
その映画は大成功だった。
BACK INTO ENGLISH
The film was a great success.
That didn't even make that much sense in English.