EEEEEH... depends. I think we've seen enough of Squall and Rinoa that another whole game of them would indeed be superfluous.

But as for the world? Don't forget Esthar is STILL being overrun by those monsters as far as we know, and that whole Moon Crisis thingy might be an issue that needs to be resolved. OTOH, 'saving the world' might be anticlimaic after 'saving the whole fabric of space and time' but there you go.

Another idea people have is a prequel based on Laguna and the gang (not m favourite but hey...)

And regarding the whole 'plan to get money.' What... you think they made all the other Final Fantasies because it was sunday evening and they were bored? Thing is, there are some of us who feel like there's another story in the FFVIII world, and who wouldn't mind visiting it again. It's up to Square-Enix to decide whether to do that, and who has the right to tell them they 'shouldn't' because 'so and so' is sacred.