Read from Kotaku:
As Mario turns a positive decrepit 35, the young, sprightly (spritely?) Sonic next year celebrates his 30th birthday. And news has slipped out that Sega is planning to celebrate the anniversary with multiple new Sonic games.
It seems an advertisement was sent from Sega to investors (thanks Tails Channel) that as well as rather boldly boasting about the success of the Sonic film, went on to suggest a bumper crop of Sonic goodness for next year.

As Mario turns a positive decrepit 35, the young, sprightly (spritely?) Sonic next year celebrates his 30th birthday. And news has slipped out that Sega is planning to celebrate the anniversary with multiple new Sonic games.
It seems an advertisement was sent from Sega to investors (thanks Tails Channel) that as well as rather boldly boasting about the success of the Sonic film, went on to suggest a bumper crop of Sonic goodness for next year.