Thread:Slipperybrain/@comment-24810590-20151216053435

I think I can answer your question on why the movie is going to be rated PG-13. I found this on Tracking Board.com :

"Sonic has a long history, as it’s been adapted for the small screen numerous times in the past – once as an animated movie (1996) and once as an animated television series (1993). This project currently in development, however, will bring an entirely new edge to the story, revealing the darker side of the blue hedgehog. It’s a smart move by Columbia, as many fans of the original game are now into their late 20’s to early 30’s, and would need a stronger draw to get them into the theater. It also allows relatively new fans to join in – those who only know Sonic from the new Nintendo Wii versions or their Android/iPhone devices. Someone at Columbia is either a huge fan of the hedgehog themselves, or they just have a really good sense of the current market. Either way we are not complaining, as the movie could be a really big hit if development continues in this direction."

It states this: "will bring an entirely new edge to the story, revealing the darker side of the blue hedgehog." 