Duplicating the success MLP has had with the brony fans will likely not work if they go in with the mindset of "How can we get the young adult male audience" Because the typical things the corporate workers at Hasbro will probably think will get the young adult male audience (pop culture references, hidden sex jokes, totally radical characters who use boss slang) aren't what made MLP popular with that audience. MLP became popular because the show had solid characters, had innocent optimistic humor, and above all was very sincere. You can't duplicate sincerity