They don't have any big games other than Versus soon, right? I don't really think so, not right now.
Their stock has been decreasing steadily for some time, I don't think its a very good investment. However, it did seem to shoot up when FFXIII released, so its possible that it could be unloaded around 13 versus is released.
Problem is they spent a lot of time and money making these few games, they created a brand new engine and core for the whole thing for 13 vs and XIII.
I think if you give it time you never know whats around the corner.
I personally though wouldnt buy shares.
If my velocity starts to make you sweat, then just don't