Board Thread:General Discussion/@comment-24534644-20140211205613/@comment-477304-20140211215131

There isn't any proof that Nintendo were directly involved with those games, the deal was basically "Hey Nintendo, we're going to make some Sonic games for you."

Sonic Boom is it's own thing, Sega and Sonic Team are still planning to make their own Sonic games.

Dragon Age was Bioware, the same people who made the first Sonic Chronicles.