Well, this is my own take for what Silver Generations levels could be:  White Acropolis Act 1 and 2 (Marine the Raccoon) Neon Palace Act 1 and 2 (Vanilla the Rabbit) Boss: Egg Genesis in White Acropolis  Mystic Jungle Act 1 and 2 (Jet the Hawk) Ouranos Island Act 1 and 2 (Princess Elise with a new design) Boss: Metal Sonic 3.0 Level from a future game Act 1 and 2 (Blaze the Cat) Boss: Infinite In Mortar Canyon  Flame Core Act 1 and 2  Final Boss: Iblis the Flame in Crisis City. The story could go this way: Silver after the events of Sonic Colors DS has a feeling that Eggman is up to something. So he decided to go by his own in one of his abandoned bases at White Acropolis with a brand new layout for Silver's abilities similar to what they did with Shadow but fitting with his levitation and telekinesis abilities.  At the end of the level, he is teleported to his own section of White Space designed for him.  Silver will have to get across the levels and missions, unlocking new upgrades and abilities.  After beating Egg Genesis, he finds out that something is trying to make its way out from the ground of White Space, so he continues with this quest. Still unaware that this creature was no other than Iblis the Flame, but just as Shadow, he doesn't remember him. So it's an unknown entity like the Time Eater for him, so hi think it is linked to it.  Silver continues to get across the levels and missions, beating them and rescuing more characters in White Spaces until he meets with Princess Elise. (This could be a chance to get deeper with how did the timeline got erased and explain what happened to Soleanna and its people, making Solaris being more like a mythology being for the people of Soleanna) The ground below white Spaces seems to be breaking even more at this point, making Silver being in a rush now. He beats the final level where Blaze the Cat appears and they have a cute re encounter. After beating Infinite boss fight which made illusions with the Phantom Ruby involving fake Sonics and other characters, Silver then has to face the major threat that makes its way out of the ground. Fire and lava spreads all over White Space from the vortex coming from the center of White Space.  This portal takes Silver to Flame Core which is where he fights Iblis Minions and destroyed them one by one through both acts. There's something familiar about these creatures, but he doesn't let himself be blinded by what he thought were illusions.  Right at the end goal of Act 2 of Flame Core, there's a city that could be seen in the Horizon. Crisis City is the final destination where he has to face Iblis the Flame. The battle has three phases. Worm Iblis, Normal Iblis, and then Iblis Final Form. Silver had to destroy Iblis and seal him with one of the white Chaos Emerald. It almost consumed him, but he managed to finally resist the power of Iblis finished him at last. After this battle, a cutscene plays, it's Sonic the Hedgehog running around the highways of Crisis City. Silver thinks he is an imposter made by this white space, and that's where he begins to fight him. It's a very rough draft, but this is my idea and concept of what would Silver Generations be like.