We all know that Origins is new and that there are currently only 3 expansion levels revolving around Bram the Beheader.
Next idea The Rise of the Juggernaut
The Juggernaut has always been one of my favorite bosses, the first boss fight in a Kingdom Rush game. I would really love to hear about his origin and maybe even fight him again, there could also maybe be a pack for frontiers and we fight an upgraded Juggernaut.
Feel free to state what you think about the idea and also feel free to say any ideas of your own