Of course the dev teams behind Smash 5 will do something different to make a Bayonetta Stage, but I will have my take anyways..
To me... I envisioned that Bayonetta stage will consist of the Trinity of Realms, obviously taking place in Bayonetta 2, but with some nods to Bayonetta 1.
The order will cycle from top to bottom, with a face on the platform's center for teleportation, and transition color:
Paradiso - Jubelius - Yellow
Purgitario - Omne - Blue
Inferno - Sheba - Red
Return to Paradiso and repeat cycle
Paradiso:
Boss: Temperantia
A very flat stage with a few platforms from above, will have no gaps. The background will be golden filled with some lush greenery. The statue of Jubelius is part of the background, but close to the fighters and very small in scale that it's not taller than the height of 3 bayonettas. Further in the background, you can see plenty of angelic creatures traveling peacefully, that includes Affinity, Harmony, Acceptance, and Enrapture in a golden-colored sky.
When players are about to be warped from one realm to another, a Final-destination-sized platform approaches, decorated with Noatun-aesthetics as the base, with Angelic and Demonic aesthetics on the sides and center (representing the female ruler). Also the background color changes depending on transition between two realms:
Yellow (Paradiso) -> Green -> Blue (Purgatario)
Blue (Purgatario) -> Purple -> Red (Inferno)
Red (Inferno) -> Orange -> Yellow (Paradiso)
Purgatario consist of one of two possible locations, randomly selected. Set in an American City, filled with tall buildings and other urban aspects. The sky is blue as usual.
Location 1:
Boss: Gamour
This one will take place high in the sky, and 3 Platinum Angel jet planes, will appear as moving platforms.
The three planes will make several formations that include the following:
- Triangle (flat) with slow rotation
- Vertical
- Horizontal
- Diagonal (BL->TR or TL->BT)
The planes will slowly move from one formation to another, again in semi-random order, which all options must be explored at least once
Location 2:
Boss: Gomorrah Unleashed
This one will take place on the rail-way, which consist of two rows of platforms: the bottom is flat, where the trains will pass through with a warning; the top will have a rail-way partially wrecked, with two segments, equally separated to leave a gap in the center and the edges so the players can avoid the train. The top platforms will be-pass through
Inferno:
Boss - Alarune's Insanity form (2nd and final form)
Consist of two large platforms at ground, again spread equally apart so there is a gap at the center. However, a temporary flower-like platform will come up slightly above the ground, and then return downwards. The background will consist of more organic, and alien-looking assets to give a chilling feeling in Inferno. Further in the background, you can see a glimpse of various demons fighting against each other, with Hideous and Hatreds being thrown around like rag-dolls and clashing like mobs, Pain and Pride chain-sawing against the demon horde, Greed and Resentment eating up weak demons as if the buffet never ends. Behind the battle of the demons, the sky is very red with a very bright aura, with a very giant figure that sits on the throne made of finely crafted demon parts. That giant is none other than Queen Sheba, dressed up in witch hair, enjoying the bloodbath from the demons as well as few visitors. After a while, she casts the fighters away and sends them back to Paradiso to repeat the stage cycle.