I don't think you can assume that. I believe they pick teams based off of a number of things, not limited to past performances. And orange has never been large. I assume their intentions last year were to do large senior, and aces were asked after other large teams declined.
On a separate thought, i don't think that Stingray's Level 5 teams have ever been to a Jam Brands comp? (at least not any time recently).
Also on the note of the large senior teams aligning comp schedules, i think it makes a lot of sense. What is the point in not competing against anyone all season. Yes its nice to compete with no pressure here and there, but if you want to bring your top game at worlds then it would make sense to work at it all season.
What comps will we see the major Large senior teams?:
The Majors (cea, ca, f5, wc)
Champions League (cea, ca, f5, wc, rays)
NCA (cea, ca, f5, wc, rays)
Cheersports (f5, wc, rays)
Ultimate Battle (cea, wc, f5?)
UCA (WC, rays)