diff --git a/wp-admin/js/customize-nav-menus.js b/wp-admin/js/customize-nav-menus.js
index f51f6296d2..2addf27562 100644
--- a/wp-admin/js/customize-nav-menus.js
+++ b/wp-admin/js/customize-nav-menus.js
@@ -3114,7 +3114,7 @@
 		nav_menu_item: api.Menus.MenuItemControl,
 		nav_menu: api.Menus.MenuControl,
 		nav_menu_name: api.Menus.MenuNameControl,
-		new_menu: api.Menus.NewMenuControl, // @todo Remove in 5.0. See #42364.
+		new_menu: api.Menus.NewMenuControl, // @todo Remove in a future release. See #42364.
 		nav_menu_locations: api.Menus.MenuLocationsControl,
 		nav_menu_auto_add: api.Menus.MenuAutoAddControl
 	});
diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index ed8c76df24..d2d89ff892 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -317,7 +317,7 @@ final class WP_Customize_Manager {
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-name-control.php' );
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-locations-control.php' );
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-auto-add-control.php' );
-		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-new-menu-control.php' ); // @todo Remove in 5.0. See #42364.
+		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-new-menu-control.php' ); // @todo Remove in a future release. See #42364.
 
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menus-panel.php' );
 
@@ -325,7 +325,7 @@ final class WP_Customize_Manager {
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-themes-section.php' );
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-sidebar-section.php' );
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-section.php' );
-		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-new-menu-section.php' ); // @todo Remove in 5.0. See #42364.
+		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-new-menu-section.php' ); // @todo Remove in a future release. See #42364.
 
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-custom-css-setting.php' );
 		require_once( ABSPATH . WPINC . '/customize/class-wp-customize-filter-setting.php' );
diff --git a/wp-includes/customize/class-wp-customize-new-menu-control.php b/wp-includes/customize/class-wp-customize-new-menu-control.php
index 9925b59bff..ecd164c7cb 100644
--- a/wp-includes/customize/class-wp-customize-new-menu-control.php
+++ b/wp-includes/customize/class-wp-customize-new-menu-control.php
@@ -36,7 +36,7 @@ class WP_Customize_New_Menu_Control extends WP_Customize_Control {
 	 * @param array                $args    Args.
 	 */
 	public function __construct( WP_Customize_Manager $manager, $id, array $args = array() ) {
-		_deprecated_file( basename( __FILE__ ), '4.9.0' ); // @todo Move this outside of class in 5.0, and remove its require_once() from class-wp-customize-control.php. See #42364.
+		_deprecated_file( basename( __FILE__ ), '4.9.0' ); // @todo Move this outside of class, and remove its require_once() from class-wp-customize-control.php. See #42364.
 		parent::__construct( $manager, $id, $args );
 	}
 
diff --git a/wp-includes/customize/class-wp-customize-new-menu-section.php b/wp-includes/customize/class-wp-customize-new-menu-section.php
index e0b9b0c5ad..28d9015c9f 100644
--- a/wp-includes/customize/class-wp-customize-new-menu-section.php
+++ b/wp-includes/customize/class-wp-customize-new-menu-section.php
@@ -38,7 +38,7 @@ class WP_Customize_New_Menu_Section extends WP_Customize_Section {
 	 * @param array                $args    Section arguments.
 	 */
 	public function __construct( WP_Customize_Manager $manager, $id, array $args = array() ) {
-		_deprecated_file( basename( __FILE__ ), '4.9.0' ); // @todo Move this outside of class in 5.0, and remove its require_once() from class-wp-customize-section.php. See #42364.
+		_deprecated_file( basename( __FILE__ ), '4.9.0' ); // @todo Move this outside of class, and remove its require_once() from class-wp-customize-section.php. See #42364.
 		parent::__construct( $manager, $id, $args );
 	}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 403e5a6ef3..216802b88f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44227';
+$wp_version = '5.1-alpha-44228';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.