tantive

This plugin allows background images to be set for all blocks. 
You can set CSS background-image, background-repeat, background-attachment, background-position-x, background-position-y, and background-size.

Tantive Set Background

Example block scaffolded with Create Block tool.

EntroThemes

Martin Tonev

Entro WordPress Coming Soon per post/page or global is a plugin which provides coming soon and/or under construction functionality. Administrators can choose from 6 different templates for global or 3 templates for page/post. Each template has a functionality to integrate with Mailchimp, set timer, set social links add info box and set title. All templates are responsive and translation ready.
Features:
<ul>
<li>Responsive design</li>
<li>6 templates for global coming soon/under construction</li>
<li>3 templates per page/post coming soon/under construction <a href="http://codecanyon.net/item/entro-wordpress-coming-soon-per-postpage-or-global/15965304/?ref=entrosolutions&license=regular&open_purchase_for_item_id=15965304&purchasable=source" rel="nofollow ugc">PRO version ONLY</a></li>
<li>Video background templates integrated with YouTube and Vimeo <a href="http://codecanyon.net/item/entro-wordpress-coming-soon-per-postpage-or-global/15965304/?ref=entrosolutions&license=regular&open_purchase_for_item_id=15965304&purchasable=source" rel="nofollow ugc">PRO version ONLY</a></li>
<li>Animated background templates</li>
<li>Static image background templates</li>
<li>Countdown timer</li>
<li>Integration with Mailchimp</li>
<li>Social media links Links to most used and popular social media links</li>
<li>Administrator check Our plugin will detect and not shown coming soon template if logged used is administrator</li>
<li>Color customization</li>
<li>Easy Install</li>
<li>Translation Ready</li>
<li>SEO Ready</li>
<li>WordPress Best Practices</li>
</ul>
Need Help?:
<ul>
<li><a href="https://www.youtube.com/channel/UCskCjIHDyjzdZmFtZXoSbVQ" rel="nofollow ugc">Video support</a></li>
<li><a href="https://entrothemes.freshdesk.com" rel="nofollow ugc">Ticket system</a></li>
<li><a href="http://entrothemes.com/" rel="nofollow ugc">Subscribe for latest news</a></li>
</ul>
Follow Us:
<ul>
<li><a href="https://www.facebook.com/EntroSolutions/" rel="nofollow ugc">Follow us on Facebook</a></li>
<li><a href="https://twitter.com/entrosolutions" rel="nofollow ugc">Follow us on Twitter</a></li>
<li><a href="http://codecanyon.net/feeds/users/entrosolutions.atom" rel="nofollow ugc">Follow us on Envato</a></li>
</ul>

Entro WordPress Coming Soon per post/page or global

Great plugin idea

Wordpress Coming Soon, Under Construction per post/page or global

Tantive Set Background vs Entro WordPress Coming Soon per post/page or global