As I recall a 'new' T3 boss was to be implemented into the game. But here we see the all expected tortodrone as the new T3 boss is actually an event? So this does mean that we will have A NEW and not copy -> recolored -> pasted game content in future updates? Just gets me more hyped about arcade redux and this mysterious new boss.
ps. I would had preferred a tortodrone as a arcade add on (such as a rare monster) but what ever.
Remember that we are also suppose to be getting more story following the artifact. I don't think the boss would come before the story. Just saying. Not to mention there is nothing to build up to this event other than "Hey look! Lets kill a bunch of these mighty, ancient, and legendary creatures to make shields out of them!"
As for an arcade add on, that's what everyone wants. Except for that one smart person who realizes that 20 sparks is a bit more valuable than the 50 crowns you can get from killing a Torto.