Aren't all of the adventures huge? Seriously. It's great that you want to start an RP! I'll join it, if you wish. I'd like to be in it.
Do you have a plot in mind? Or do you plan on it being a rp thread where folks can make up stuff including short or medium plots. Or a day in the life in the Great Valley sort of thing? Also some find it more helpful to list characters and who is playing them. Up to you if you wish to do this or not. An example is like: Littlefoot - Spyro Cera - Ducky - & so on.
I would like to play Topsy (Cera's dad) and/or Littlefoot's Grandfather.
Topsy then. Unless you can get one person for each and every character, you are probably going to want to let some people play more than one... otherwise, you might not have enough players to fill all of the positions. Just a suggestion.
So is it 1 char each, multiple each, or 1 kid char and 1 adult, or what when it comes to Feature Characters? and how about original characters, or are they not allowed?