I'll forever be so sad and mad about what happened to Disney Infinity. 4.0 was slated to reach the exact expectations we all had for the franchise since it began. I will always hate Disney Interactive for squandering its potential and giving up on it. It was one of the only in-house projects making them money at the time of them cancelling it.
I think if they had pushed more marketing with their films and started doing some animated shorts—perhaps even making a toy from the game a free gift for attending their films to create more incentive to play—this could have gotten the traction it needed to revitalize the franchise.
This, the Moana stuff, the Kingdom Hearts content that was going to come...it just grinds my gears that they didn't let this project happen.
No other Disney game is doing this kind of stuff, either. Not even Kingdom Hearts because they are still limiting the interactions between franchises. Not even that Bandai Namco series Disney Magical World was all the way there with the segregated locations.