Just 5 50's for me, but I had about 2 dozen total on each on Victory (members of either Kourage or The Wrasslers) and Infinity (Adverbs/Adverse).
Kid Kourage - scrapper, Martial Arts & Super Reflex
Courageous Lee - tanker, Invulnerability & Energy Melee
Severe Lee - corruptor, Ice & Ice
The Great Green Hat - mastermind, Thugs & Force Fields
Shatter Rat - controller, Earth & Force Fields (and yet totally unlike GGH)
Bison Boy (tanker, Invulnerable & Super Strength) was level 48 when they announced, and I could've easily gotten him to 50, but there were so many other things I needed to experience at least once first, so he didn't quite make it.