ἦ μὲν δὴ λώβη τάδε γ᾽ ἔσσεται αἰνόθεν αἰνῶς
εἰ μή τις Δαναῶν νῦν Ἕκτορος ἀντίος εἶσιν.
I don't think I have seen this construction before: future indicative in the apodosis and present indicative in the protasis (with μή). It's almost a future most vivid construction (a rare occurence, I remember from Mastronarde), but then you would expect the future indicative in both protasis and apodosis.
Is it because of εἶσιν having a future connotation ...