In the scene, the character, known to his mother as Miles Prower but to legions of fans as "Tails," appears for the first time in the movie. We see Tails emerge out of a ring portal on a cliff ...

While that obviously doesn’t tell us much about the plot of the movie, it does set up the Tails appearance that was teased at the end of the first movie. The other loose thread is Doctor Robotnik.