Transformania is already the fourth entry in the Hotel Transylvania franchise. It's a bit of an unlikely success, much of the original cast has moved on to work on other projects and the sequels don't add too much to the original, but it's also not the worst thing US animation has on offer.
Dracula is planning to retire and leave the hotel to his daughter and son-in-law, but right before the big moment he chickens out and comes up with an excuse. The hotel can't be transferred as Johnny isn't a monster. Johnny asks Van Helsing for help, but his device has some unintended consequences.
Johnny's character is a bit annoying and the plot is completely inconsequential, but there are some decent enough jokes, and it's nice to see a film with a slightly different art style. The pacing is solid, and the runtime isn't too long. Pretty decent filler in other words, but I do think it's time to end this series.