I caught the 3:00pm GMT showing at my local.
I was entertained, Marlon waynes did add a comical aspect to it but tbh it wasn't heavy like normal it was subtle goofy.
Josiph gordon levit errr......... (OVERACTED) cobra commander just a tad with the deep gurff fready kruger voice that only got worse by the end of the film
Christpher ecclson well he did his part okish but

you need to watch da movie.
Oh and brendon frasier made a camio in the movie as one of the sargents in the pit, he was in the movie less then 5 mins but i guess he got a part cos of the director, same as the guy who plays Zartan.
guys good movie not bad atall but plot is very MGS+x-men+team america cos you can pritty much see all 3 in this one movie.
much of G.I.Joes weapons seem to be stolen from a ton of films, even cobra have sonic weapons that during the first fireing of the "HUGE" sonic beam it makes a TRON derez sound effect. (listen for it)