I used to drink loaded soda in high school. There was one flavour called mamba fruit or something like that. It tasted exactly like root beer. It was vodka based, and the reason I can't touch that stuff anymore (vodka that is). It was WAYY too sweet so was pretty gross in hindsight. One on its own was good, more than that was awful.
That being said, if you're careful, you could probably make this really nice. Many ciders are fairly neutral in flavour so could take on more without really clashing. I would be careful with making it either too sweet or too high abv.
Keep us posted on your progress, maybe in a thread with a more searchable title....