Assuming they did not rip off too much, they should just rename the game, characters, locations, redraw the character sprites so they bare no resemblance and then release like that. If they are still not happy and are feeling daring, they can later "leak" a patch which changes everything back to as it was originally intended.
It was a Chrono Trigger rom hack. Removing all Square-Enix IP would be starting from scratch, thus not really a viable option.
Additionally, there is a strong ethical argument against protectionism. "Buy American" is essentially a racist statement. You're implying that the value of an American is higher than that of someone from another country by saying that it's better to protect industries in this country to protect the jobs. At some point, we've got to start calling out "Buy American" for the racist statement that it is.
Not completely on topic, but something I'd like to add to this. When I purchase things, usually of the food variety, I check to see where it originates from. I try to avoid purchasing things like, apples from china, oranges from brazil, etc... mainly because of the transportation costs associated with such an operation. I am in inadvertently 'Buy(ing) American', but really aiming to buy local products. I am by no means saying that people should or do purchase cars based on locality, just that some types of products lend themselves more to this type of purchase.
I judge a religion as being good or bad based on whether its adherents become better people as a result of practicing it. - Joe Mullally, computer salesman