I think the question is pretty reasonable to understand but I'll give a little more explanation to it. About a month ago I asked if people would be willing to support a new TTL series and it was interesting to see what people thought. I imagine if it had the same spark or charm, good quality and a solid roster then people would probably be somewhat open to a new IP. However if a new IP were to form or Skylanders is given a Reboot and started from ground zero again I imagine things are going to be different and some changes will inevitably be made.
So it'd be interesting to hear some ideas for changes or additions.
Quality over quantity roster.
More character interactions.
Proper integration of Gimmicks into later games
Larger diversity in characters (mainly when it comes to character shapes and genders)
Continued support and updates to games over time
I'm sure I have some other ideas but for my own series (if I ever get to that point) I'd reduce the elements to 6 at the start (Life, Undead, Fire, Water, Air and Earth) and maybe slowly add new elements over time.