This is an Idea for a new complete ark of monster legends with new events, etc.
Based on the fact that Bonnie Bark is OP to be just an Epic.....
Bonnie Bark is missing, the complete canine band is baffled, they can't find her, insert here an event to get Bonnie bark back, meaning Bonnie Bark cells for every body to craft her and possibly rank her up.
Monsters are missing, Carlo Canbino Finds a lead, Dr Viktor has Bonnie, he is testing a new invention, the metamorphosis Chamber on the lab.......
Now using a level 100 ranked up Epic monster, elementium and another requried item that can be acquired on dungeons or events. some monsters can be changed to the Legendary rarity.
Bonnie Bark is transformed to a Legendary, attacks, stats are improved, etc.
Event for Nautilus
Event for Ophiucus.
Selected amazing Epics can be changed to a Legendary version of themselfs.
Just an idea of something that can in the future keep people playing the game.