A: Do you think that our new product will catch on?
B: Of course it will! You’ll see.
In this situation, what should you say ‘You’ll see.’ in Japanese?
Business
B：今に分かりますよ。
Note: This is not a word-for-word translation.
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A word-for-word translation
B：あなたは分かるでしょう。
This is grammatically correct, but we don’t say it.
‘You’ll see’ is used when the speaker knows the result but the listener isn’t sure.
So, it’s better to add 今に or すぐに to give a good indication of the meaning.
Kotoba no Hibiki 