I would love to see the story behind Aeon ascension of power from being a simply fat baker to one of the members of the prestigiously club of "time traveling sirs" wich saint germain is also a part of.
of course saint germain and aeon don't go along too well, since saint germain can't stand aeon obsession with baked goods and other delicate dishes that aeon seem to spread trough all igavanias games, despite its achronological nature.
the gameplay would implement having to collect such dishes which would give you powers similars to the souls of aria of sorrow, for example, collecting a bunch of sausages would give you access to a sausage whip, a weapon that could emulate the old whiping feel that some titles of the saga seems to be lacking.
also various famous subweapons would make a return, such as the fan favorite "pies", or "glass of wine", for nostalgia factor, and some new ones such as the "flambé pancakes". Also, you could create diverse constructs like the "bread golem" or the "ice cream animated armor" wich would function as your familiars which also will be able to gain levels and evolve into more complex monsters like the "bitter chocolate goliath", much like the award winning game "Curse of darkness".
the enemy would be of course Orlox which have stolen an important set of diner silverware for his fancy table back at the castle, but as plot twist, he was being used by the true mastermind behind every felony, Galamoth which is trying to control the future, so he can create the ultimate ice cream flavor for it's own enjoyment!
i can't fathom how all this part of the stroyline have been left in the dark for such much time!