Over at CommanderBond, it seems like Mendes has been hinting that Radiohead is going to be doing the song. There was also apparently a source saying that the choice was "out of left field," which kind of eliminates Goulding since she's been #1 speculated.
But does she also possibly have a project this year that might be considered for Golden Globes later on?
Yes she does, a role on AHS: Hotel and a song written with Diane Warren on The Hunting Ground. There is no way she's adding another one to that list in the same year.
I don't think so.