Yesterday, Sega released a new trailer to coincide with the launch of Super Monkey Ball: Banana Mania. This video constisted of animated and gameplay segments. And in both segments Sonic and Tails make a cameo. This is not out of left field because the characters are both DLC characters but in my opinion surprising.
At 1:12 the cameos start:
The music style in the trailer might sound familiar because it was made by Hyper Potions.
Super Monkey Ball: Banana Mania is currently available on all major platforms, and includes classic style Sonic and Tails as unlockable characters using in-game currency.