Here are some potential new features that could be included in WordPress 6.3:

1. Enhanced Content Block Options: WordPress 6.3 could introduce more advanced options for content blocks, allowing users to have more control over design elements, such as borders, shadows, and spacing.
2. Improved Theme Customization: The new version might offer a more streamlined and user-friendly interface for customizing themes. This could include additional options for adjusting typography, colors, and layouts.
3. Simplified Media Management: WordPress 6.3 could introduce a revamped media library with improved organization and filtering options. This would make it easier for users to find and manage their media files.
4. Enhanced Site Health Check: Building on the existing Site Health feature, WordPress 6.3 might add more diagnostic tools and recommendations for optimizing website performance, security, and overall stability.
5. Integrated XML Sitemaps: This update could bring native support for XML sitemaps, eliminating the need for third-party plugins. XML sitemaps help search engines understand the site structure, improving SEO.

Please note that these are just potential features and what actually comes in WordPress 6.3 might vary. Developers and contributors are continually working to enhance WordPress, so stay tuned for official announcements and the release notes for more accurate information.