critique of poster

1)If your going to do Leet with numbers you should really put 1337, just saying.
2)Be concern that people may think its more of a CD then a concert. Over 9000 dose not make any sense...Explain much.
3)I kind of want to see more design..
4) Date/info/time is squished!! Plus band name doesn't really stand out.

But on the plus side I like the Mario reference.