The FFRPG will certainly be using the d20 rules, making it compatible with the Myriador Fighting Fantasy adventure modules. It will be a stand-alone book, containing everything you need to play.
The only other thing to add is that the FFRPG is aimed squarly at the new entrant into the RPG world. It will feature simplified rules and step by step instructions on how to run a game.
If you are an experienced gamer wanting to play in the world of Titan then you will have to wait just a little bit longer. Full world guides will be released in due course.