Someone posted a question on Domain Questions asking about what gTLD applications can be expected to be received by ICANN. I did a bit of research, and I found the .NXT conference website run by Kieren McCarthy and Jothan Frakes, which has a list of applicants for gTLDs.
It’s a pretty interesting list of extensions, although in my own opinion, I can’t see how many of them will have commercial appeal or gain traction. Some of these extensions have multiple applicants, which means more money for ICANN if they go to an auction.
Here are a few of the potential gTLD extensions: