For 2.6 there will be a huge focus on new Vehicles & and expanding the dungeon system created in 2.5
You probably have noticed the vehicles don't move well currently, and the wheels don't move/rotate. With 2.6 this has been resolved and the new survival vehicles from the Synty studios pack will be integrated. I have a few new things I want vehicles to be able to do so stay tuned for updates.
2.6 dev blog updates will continue on the official forum here.