LOL sorry for getting ur hopes up......
and the reason they use the same name Final Fantasy...is because that the way it has been dating all the way back to the first ff. Plus the battle system is always similar, you got ur magic, ur summons, and of course ur ultimate weapon and an optional monster that is a hella of a lot stronger then the final boss. IE: the weapons, omega weapon, etc. To change the FF name would break an age old tradition in Square.