I very much doubt it. Even though we've made friends with other races we've long had conflict with we've never had the same kind of issues with them that we have with the hive. Cabal afaik have never outright sought to wipe us out barring the specific Cabal legion that came and kicked our city down. (I could be wrong though as idk if he was acting on the will of the Cabal leaders or not.) Fallen on the other hand were mostly always just fighting for survival. Just happened that their way of survival often meant huge danger to everyone else. Hive on the other hand are well...a Hive. Even if the specific group of Hive under Savathuun are different they still are a Hivemind that follow her. At best the kind of help we'd get from them is them distracting Calus or the Witness's attention on a different front. I do not see them fighting directly beside us on the battlefield. Certainly not as something planned. I do think Savathuun herself will likely resurface and "aid" us in some way. But it will be to further her own goals and what she wants to do for her species. She doesn't/won't ever have a permanent investment in our survival and thus cannot be a true ally like the fallen house and Caitil are.