I would have to guess that it was in '90 as the UK Pred's seem to be an All-Star team.
In your Battle Zone Predators picture....I only see 2 possible UK Predators besides Marcus. the guy right behind him and the guy in red.
In your Bart's Stud Squad photo there is Jacko Parsons(4th from the right in the back row) and of course Rafe & Bart Farmer 3rd and 4th from the left on the front row.
I can't remember what teams Phil Hamm, Syd and Dave Spidel, and Vic came from.