Again, off personal speculation, I would agree nothing will be coming soon. But I do think sometime after 2021 there will be a huge replacement whether it's Zootopia or something else.My guess is that they decided either that going seasonal wasn't enough of cost savings or that opening things back up "seasonally" wasn't worth the effort.
From how this is going, I also don't expect this to indicate a replacement coming soon, just cost-cutting.
A train route like that would be great! but I don't expect it to happen. That would be a very useful route.It's probably too late for this, but I wish they would reroute the train tracks so they did some sort of loop around AK. Maybe a shuttle from Africa to Dinoland? Or they should bring back the boats as transportation.