So far I haven't heard anything, but here is my opinion...
After catching up with the manga (Ch.60 unless the next chapter has been uploaded) I can see why they would avoid making a second season. Currently Teito is traveling with Frau to the 7 God houses and collecting the cursed tickets to go to the Land of Seele, and of course each God House has it's own little plot. When anime companies make 2nd seasons of animes such as this one, they usually end up being only another 25 episodes. If you do the math, the 1st season lasted about 30 manga chapters, and there already 60 chapters, but if I remember I think the duo is traveling to only the 3rd or 4th house. Simply put, it wold be too long to make a 2nd season. But it would be nice to have one.