Under-utilised Themes ripe for expansion

Whether you enjoyed the games or not, the Horizon series is prime for adaptation to Lego kits - all the machines in the games would make fantastic display models. Yet, apart from the Tallneck, and one other smaller playset, we haven’t seen further releases. I wonder if the relative poor reception of the Lego Horizon video game put a damper on things. Fingers crossed that with Horizon 3 coming along, we may see more releases to tie in there. What are some other themes that you feel was...