Just the fact the title of the game is 'Lightning Returns!" makes me want to hit squareenix with a 2 by 4. REALLY Square? You're that original?
I, like everyone else, will be glad when this trilogy is over, because Lightning is not that great of a character. Hell, I wish the main character was Noel. I'd get behind that...and he's just okay.
To SE's credit, the entire world seems to be different so I'll hold off total judgement until we get more info.
At least they didn't call it FFXIII-2-2: Lightning Harder, FFXIII-2-2: Judgement
Lightning, FFXIII-3: The Good, The Bad, and The Lightning, FFXIII-3: Secret of the
Lightning, FFXIII-3: The Lightning Strikes Back,
FFXIII-2 Part 2, FFXIII-3: You Only Lightning Twice, FFXIII-3: Lightning and the Temple of Doom, FFXIII-2-2: The Wrath of Lightning, ect....
Also if you want more Noel then you might want to try the Kingdom Hearts series, he features in some of those games. Though like Squall, he too renamed himself to hide his involvement in the FF series. I believe he goes by the name Sora in KH.