There is so little discussion about this crossover, and what show it might be with, so lets just gather some facts.
This is assuming that this episode is indeed, not one gigantic ass-pull.
-It has to be a show exclusive to CN (duh)
-This show in some way involves a mysterious creature either as the protagonist or as a major villain (Ferrick's hint)
-I guess it has to have a similar theme to Omniverse, action-comedy (pretty straight forward)
-And, this is a stretch, it has to be a show which isn't currently in production. (Considering that it is a fully Ben 10 episode and CN hasn't commissioned an hour special)
All these are subject to be proven false, but does anyone have any idea of any show which fits these bills?