Marvel Writes Back
I've heard back from Marvel Comics on Saturday morning after submitting a sample of my writing. Although it depends on how you look it, there was not really any bad news in their letter other than that they 'currently do not have an appropriate project available'.

As far as I'm concerned, if they told me to bugger off, that would be bad news!

But the editor has stated that they are interested in my work, and to send in future samples at any time. Could be the first step?