Hmm, unlike most ppl here, I actually enjoyed FF13 and 13-2 quite a lot and really hate that we didn't get Type 0 (yet at least)... Was really looking forward to it as well as it seemed pretty fun from the videos, even if it was just for PSP (HD re-release anyone?).
Sure 13 and 13-2, were no Final Fantasy 6, 7 or 8, story wise, (and it wasn't as utterly disgusting as FF9 story either), completely agree with everyone there! But it was still way above other RPGs I played before, and while the battle system was simple, it still allowed us strategize (in the end-game stuff) when beating the final boss with 5 stars or when I had to kill all the Cie'th Stone creatures with 5 stars aswell. I actually found 13-2 battles a bit duller even tho they were kind of more fun 'cause of the creatures, and faster as the menu didn't feel so stiff\slow during the battles.
The graphics and the videos were also superb, quite a few minutes of 1920x1080 awesomeness were included in that game to enjoy.
And honestly if people stop going on youtube of gamefaqs or whatever they go check, every time they reach a new monster they don't know, or at the damn 1st time they lose against it, and stop to think and strategize even a minute, they would enjoy the game much more or at least they'd feel there is quite a little bit more depth to it.
I mean, back in the days, every time me or my friends finished Final Fantasy 7 or 8, we'd exchange information about the new things we found like new Summons, areas or glitches on that playthrough, and that's what was truly fun about the game. If I could have (or chose to, which I didn't) just went on the web and have every single hidden detail spoiled to me in 15 minutes I don't think I'd love those game so much like I still do.
Now imagine finding all the monsters you can play with in 13-2 without a guide.
So XIII-3 would be nice IMO, but please SE, polish the damn think like XIII; 13-2 felt like a downgrade graphics wise.