The ad which was posted back on October 29th indicates that Ghost is developing for Need for Speed Rivals as well as started work on the future iterations of the franchise. That is about as confirmed as it gets from where we sit.
What is unknown is if the new Need for Speed title is something that is for release next year or not? We suspect that this could be the case as a Need for Speed movie is coming and what a better it would be if EA had a new Need for Speed title to be released that went along with the movie. Of course this is just a guess, but it does seem very likely that the next Need for Speed title will be a movie tie-in for sure.