Ask this in the question topic.

Thank you~

Might as well answer here, but yes, for future reference, please ask here:
viewtopic.php?f=4&t=36661

Anyway. Super Smash Flash 2 is not considered a sequel to Super Smash Flash, it is instead a reboot. A do-over. This is a little confusing because of the name, which we originally were not planning to keep, but now it's so widespread we may be forced to keep it. For this reason [being a reboot] we can't say that, for example, Mr. Incredible was a veteran. Which we don't particularly want to. This also has the second-hand benefit of making the additions of the game more apparent to new players that are like "I played Brawl, what reason do I have to play SSF2?" which we can just respond to with a simple "Check out the newcomers, and all of the new stages on this page."

Hope that answers your question, and if not, feel free to ask additional ones in the questions topic.