“Did God make any promises to Abraham that remain unfulfilled?”
I count 40 separate promises to Abraham made over the course of seven chapters and a period of (very approximately) 40 years.
How about that.
Mileage May Vary
Your mileage will certainly vary, for a number of reasons. For example, promises #3 and 4 could be considered a single compound promise if you like, but since they affect two distinct groups of people and could each stand alone, I am reading them as two separate promises.