I'm guessing the dragons use the terms "Worlds" and "Realms" as a different reference for "Planets" and "Territory" or "Continents".
     The portals may be possibly capable of making a junction between worlds if they have enough energy. That kind of makes sense in a way if you think about it. The question is...when and where this was first built. Most of the portals and similar archways have gems forged into them in StD and are possibly used for power fluctuation and boosting it if needed. The orbs and power crystal work in a similar way for the Super Portal in RR/GtG. Due to the lack of graphic possessing power of the PS1 I wondered how the portal transfers entities that can't fly. I think it functions like a network of worm holes and the individual's matter is divided up upon entry and reconstructed upon arrival of the set destination.  It explains some part of the interception made by The Professor when Spyro was going to Dragon Shores.

o_O It's a headache to think of all this but so is life. I think it helps just to know how some things work to stop from going into a tail spin when you try to figure it out yourself.

It would probaly end up like this:(if it was Star wars Sci-Fi)

Malefor:Spyro,I am your father.
Spyro:Noooooooooooooooo!
Ignitus:I'm his father,stupid head.-_-
Spyro:Thats even worse!

I want to have like  spacey worlds and stuff.....

And I want another giant robot as a boss....