This is a custom query fix for The Events Calendar plugin to query other post types in the same loop as events. This also works with TEC PRO for recurrence.

combine_post_type.php

<?php
/**
 * setup when your post type is saved to add _EventStartDate & _EventDuration 
 * meta fields add your own post types (line 10) to mach filters for the meta 
 * data. Then use tribe_get_events to query both all desired post types (be 
 * sure to set for future status)
 */
function extend_events_startdate( $post_id ){
  //verify post is not a revision
	if ( !wp_is_post_revision( $post_id ) && in_array( get_post_type( $post_id ), array( 'post' ) ) ) {
		$get_post = get_post($post_id);
		update_post_meta( $post_id, '_EventStartDate', $get_post->post_date );
		update_post_meta( $post_id, '_EventDuration', 86400 );
	}
}
add_action( 'save_post', 'extend_events_startdate' );

// example usage
$events = tribe_get_events( array('post_type' => array('post','tribe_events'), 'post_status' => array( 'future', 'publish' )));