wp_query is empty in admin_init - wordpress

Question

I'm developing a plugin and one of the issues I am running into is that I cannot get the post id within a function assigned to the admin_init hook.
I tried a few different methods; but, they all seem to use the $wp_query.
Below is a simple version the code I am using. I implemented the code like this just now and ran it by viewing the "post edit" page
add_action('admin_init','do_optional_featured_article');
function do_optional_featured_article()
{
global $wp_query;
echo "<pre>";
print_r($wp_query);
echo "</pre>";
die();
}
$wp_query is a mostly empty array, notably, the post member is empty
-- EDIT --
I got some advice over at wordpress.stackexchange and added in this function:
function get_admin_post()
{
if( isset($_GET['post']) )
{
$post_id = absint($_GET['post']); // Always sanitize
$post = get_post( $post_id ); // Post Object, like in the Theme loop
return $post;
}
elseif( isset($_POST['post_ID']) )
{
$post_id = absint($_POST['post_ID']); // Always sanitize
$post = get_post( $post_id ); // Post Object, like in the Theme loop
return $post;
}
else
{
return false;
}
}

Answer 1

I think this answer will help. It states that the earliest action you can hook into, to get the global $post/$posts variables is the wp action. In the action hook reference on the codex, you can see that the wp action executes a bit after admin_init, which is why you can't retrieve any posts there, I think.
So, that should work:
add_action('wp','do_optional_featured_article');