I think most people are complaining about a possibility of another sequel (yes, I'm aware companies register domains all the time without using them) is that it's probably holding up development of Versus. It was said that Square halted development on Versus at one point, so that team could help finish up FFXIII. I'm sure it's probably the same case again with XIII-2. You shouldn't announce a game and barely talk/show anything for 5-6 years now.