Early build(s) of Sonic Boom: Rise of Lyric

Sonic Boom: Rise of Lyric had been in production for quite a while (supposedly as early as 2009) before Sega made a deal with Nintendo that forced the developers to move the game to the Wii U when it was meant for more powerful consoles, and I remember seeing footage of a build from before this happened that looked substantially different and graphically superior to the final game on a demo reel (I can't find the video in question but it was talked about a lot among Sonic fans on Tumblr at the time).

There is also a variety of evidence, such as recorded voice lines in the final game and interviews with developers, that indicate that Perci was once planned to be playable, that the game was planned to feature a Tornado level, and that the game would feature Chao--I think it's possible that these may have been present in an unfinished state in an earlier build too, though possibly not the exact aforementioned one.

Aside from the dramatic visual differences I actually don't expect it to be much if anything is found, but finding old builds could also help shed some more light on just what exactly happened with the game's development.