Assigning a View to another View

Thats not critical. This is not a task for views, its a support request. In panels you can use easy multiple views as single block and put them there.

For easy exampls you could use views attachments, but i assume you cannot do it here.

As solution you could write your own ctools content_type plugin or your own block which does this

$views = array('foo' => 'default', 'bar' => 'page_2'));
foreach ($views as $name => $display) {
  print views_embed_view($name, $display);
}