Hi Erika (and Nikki)!
You know what, I wouldn't worry too much. They will "check" each other out, and then probably be fine. At least that's the way it is for Honey and Lilly when they meet someone new. What I have found is that my dogs tend to fall down and let the other dog check them out first.
You will know quickly whether they will be ok, but give them a chance, and I'll be they will be fine. But by all means, do NOT try to break up a fight by getting in the middle of it. You might get bitten or worse, and that would be terrible.
Once they get to know each other, they will get the "respect" each deserves and will be ok. At least I hope they will.
Logan