Roses at her doorstep
^ She did "Overfly" (SAO 1 ED2)
Actually my first thought when I saw the tweet but I'm pretty doubtful also cause afaik booking a recording studio is kinda expensive and I don't think she's going to record for just one song with two schedules? BUT! it's been too long already and they would already announce something so who knows. And it's SAO I'm not hopeful for them having Kajiura for OP/ED (Movie is kinda different matter for me )Maybe they were recording the full version of FtE, but couldn't release it until this month.