different teasers on different groups of pages (above the loop).

hi everyone,
iam new to php and wp so dont be too hard to me ??

i want to do something like that:
show

i have a custom menu like
-team
–aTeam
—members
—matches
—-bestMatch
—-worstMatch
—teamPhoto
–bTeam
—members
…
-fans
–bla
—blub
–and
—so
–on
…

lets say i want to position a teasers on every of that menu entries. depending on the 1stLevel menuentry on every children the same teaser should be used. on a different 1stLevel menuentry an on every children a different teaser should be shown.
eg: on “team” and every children like “aTeam” or “worstMatch” teaser01 should be shown
on “fans” and every children teaser02 should be shown.

i thought on something like this:

// get current side id
global $wp_query;
$page_id = $wp_query->get_queried_object_id();

// define siteids for the different menutrees
$team_site_ids = array(IDsOfParentAndEveryChildren);
$fans_site_ids = array(IDsOfParentAndEveryChildren);

// check in which menu and display belonging teaser
if (in_array($page_id, $team_site_ids)) {
   // load teaser02 into my div before loop
}
if (in_array($page_id, $fans_site_ids)) {
   // load teaser02 into my div before loop
}

iam sure this is not the elegant way cuz there will be to much hard coded lines and i will have more than just two menutrees. so plz give me some ideas how you would solve that and if theres a similiar plugin already availible ??