This is a tough one. Because English does not have a dedicated conjugation that is always future tense, the "will + verb" construction is typically used. But, when you have a something that already infers the time element, in this case a proposition, it is unnecessary.
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jooney“Nowadays it has to be pretty special before I’ll invest,”My first impression is that it's incorrect, but on the other hand it seems natural to refer to a "second (future) step" in this way.
jooneywhether "it has to be special" should be considered as referring to future time.I'm inclined to agree with you.