Just found out that a third sequel is planned for Tinkerbell. Here's the info.
Source: ONTD Live Journal and Topix.com
The seasons are changing and Tinker Bell and all the fairies are hard at work turning summer into fall. While everyone is prepping for the fall celebration, Tinker Bell and her friends Terence (Jesse McCartney) and Blaze take off in a hot-air balloon on an exciting secret journey and discover the magic of the blue moonstone and the power of true friendship. Voices by Mae Whitman, Jesse McCartney, Anjelica Huston, Lucy Liu, Raven-Symone, Kristin Chenoweth, Angela Bartys. On Blu-ray & DVD October 27th, 2009
Another sequel is planned: Tinker Bell: A Midsummer Storm
Tinker Bell must team up with a rival fairy to keep their existence a secret from humans.
Source: ONTD Live Journal and Topix.com