Combine query_posts() and get_posts() into single query

I think you are using the wrong post_type for regular posts.

$args = array('post_type'=>array('post', TribeEvents::POSTTYPE));  

// The Query
$the_query = new WP_Query( $args );

// The Loop
while ( $the_query->have_posts() ) :
    $the_query->the_post();
    echo '<li>' . get_the_title() . '</li>';
endwhile;

// Restore original Post Data
wp_reset_postdata();