I’m afraid no one of us here knows anything there. I would not expect it anytime soon, and frankly I don’t know if the earphones will be included again for free at all. When the earphones promotion and the recycling cashback program both expired on the same day, Fairphone only extended the latter, so I guess it was a conscious decision.
But if you are interested in a green protective case (a black one has just become available) for your future FP3, you might still want to wait a little longer as this is announced to become available (not for free) later this year (my wild guess: late summer?).