User blog comment:Jkphantom9/RvB Season 13 Credits gives special thanks to Monty Oum/@comment-25396609-20150908022324/@comment-89.142.242.199-20150909155938

They also said something along the lines of "Writing for season 1 Tucker is deifferent from season 13 Tucker. It would be fun to go back..."

So I assume that season 14 won't necessarily be all chronologically after season 13.

They also stated that there will be guest animators and different animation styles (hinting at a Jordan's Animated Adventures story)