I imagine that any non Israeli citizen will get released. If concern for those specific hostages is paramount, then NOT joining in the fight and negotiating for their release is the most likely path. Of course with a nation like the US, Hamas probably figures that as soon as they release any American hostages the US will start attacking. Then again, the US will probably start fighting no matter what. But releasing non-Israelis as soon and as publicly as possible is a good PR move for Hamas. The dual citizens are the edge case. Alas, the Israeli hostages are the ones with little hope. Normally I'd expect a protracted hostage situation but given that this whole thing started with atrocities I'm not sure Hamas could really do anything to pivot to being "the good guys" in world opinion (assuming there is anyone left without a fixed stance already) so they may just execute them as an internal rally cry.
Also likely there is little central control with Hamas, so some of these hostages are basically caught by rabble, undisciplined young men in particular, and that's a fate I wouldn't wish on anyone.