I waited until the busy time of the day was over to try again, and I was able to get in with no queue. Unsure if this is an issue with the new login world travel feature failing to acknowledge the size of the queue for what it deems to be the 'least populated' world, or something else entirely. Either way, not being able to back out of it and return to the queue for my home world effectively locked me out of my character for hours, and that's not a good outcome.