Here's my take as a design nerd:
The typography is pretty bad. Center style, uneven spacing of type, several different font sizes, no attention to kerning, bad font choice, etc.).
You almost never want to put large type over the main image. Making it semi-transparent doesn't help.
One of the posters has clear straight edges dividing the characters, while attempting to be one consistent image. A pro would at least blend the edges... but I'm thinking they wouldn't cut and paste photos they found on the internets.
They are decent for a novice with no training, but a professional wouldn't attach his name to them.
I want to know where these guys got the pics. I mean I haven't seen them at the res they have in those posters