As of right now, it appears as if Teenage Mutant Ninja Turtles will take the top spot at the North American box office this weekend. However, it's going to face some serious competition in the form of Guardians of the Galaxy as analysts believe that both movies will hit somewhere around the $45 million mark. While these analysts are favouring TMNT as of right now, word of mouth is going to play a huge role on which movie wins. Should the Michael Bay produced reboot not be well-received during Thursday and Friday's showings, it's likely that Guardians - which has so far earned $117.95 million domestically - will come out on top. So far, James Gunn's Marvel movie has attracted a lot of over 25's, perhaps as a result of the edgy humour. TMNT appeals to a much younger audience AND those nostalgic to the characters they grew up with. Combine that with a big marketing push and it's going to be close! However, Captain America: The Winter Soldier easily topped Rio 2 earlier this year. When it comes to word of mouth though, Guardians of the Galaxy has 92% on Rotten Tomatoes and Teenage Mutant Ninja Turtles has only 33%. What do you guys think?