User blog comment:ShinShinTo/What is going on with Trinity Raven?/@comment-5080223-20121227120829

Anime revealed they were alive same reason why they add/remove other minor/major things that are in the manga. They just do xD.

They could appear again if there would be another filler arc so that arc won't be so random and have important or at least interesting stuff, like what they did with the KotSS arc.

Fairy Tail isn't ending by the way, there was a blog post here about it and dunno where is it now. I imagine the next arc after GMG to take a break from revealing important plot stuff and drama, instead having more comedy. :3