Anyways, you don't have to read the whole thing, because I'll be listing all the main points that seem similar to Sonic Boom.
Sonic, Tails, Knuckles, and Amy are the only playable story characters. Self explanatory.
"At the end of the level, Knuckles comes across an underground temple"
All four playable characters can be switched to any point in Gameplay, all will be in party. -However, each character has to be unlocked in the same way they are in Sonic Adventure
Focuses around exploring
Knuckles has a unique underground attack similar to the DIG move on Pokemon, just like what is shown in the trailer.
No Chaos emeralds mentioned, also no Chao Garden.
Multiple ways to complete each level, each with a different character.
- While that is all the similarities, there aren't any confirmed differences. While we're at it...
The person who released this Sonic Rumor, also released rumors of Every sonic game since Sonic Unleashed months before the game was actually announced.
- Now, onto what this means if its true.
Silver, Shadow, Rouge, and Blaze are playable characters, however, they're a mini-adventure, and do not have major involvements in the story.
Human NCP's will react to Sonic and Tails
Emblems return, unlocking the characters previously mentioned.
This game will feature Cream, Cheese, Chocola, and Vanilla.
About a year ago, a rumor was flying around about a Sonic game titled "Sonic Excursion."

Now, here's the rumor in original format.
http://segabits.com/forums/index.php?topic=2244.msg53963#msg53963
Anyways, you don't have to read the whole thing, because I'll be listing all the main points that seem similar to Sonic Boom.
Sonic, Tails, Knuckles, and Amy are the only playable story characters. Self explanatory.
"At the end of the level, Knuckles comes across an underground temple"
All four playable characters can be switched to any point in Gameplay, all will be in party.
-However, each character has to be unlocked in the same way they are in Sonic Adventure
Focuses around exploring
Knuckles has a unique underground attack similar to the DIG move on Pokemon, just like what is shown in the trailer.
No Chaos emeralds mentioned, also no Chao Garden.
Multiple ways to complete each level, each with a different character.
- While that is all the similarities, there aren't any confirmed differences. While we're at it...
The person who released this Sonic Rumor, also released rumors of Every sonic game since Sonic Unleashed months before the game was actually announced.
- Now, onto what this means if its true.
Silver, Shadow, Rouge, and Blaze are playable characters, however, they're a mini-adventure, and do not have major involvements in the story.
Human NCP's will react to Sonic and Tails
Emblems return, unlocking the characters previously mentioned.
This game will feature Cream, Cheese, Chocola, and Vanilla.