Hi rod2
Thanks for reaching out.
WordPress.org has pretty strict rules on what’s allowed in themes and what isn’t. Anything that is considered plugin territory isn’t allowed, lightboxes are a good example of that. My favourite gallery lightbox combo is:
Jetpack Tiled Galleries: http://jetpack.me/support/tiled-galleries/
Jetpack Carousel: http://jetpack.me/support/carousel/
Ideally you should be able to build your site without touching a line of code. A build process usually goes something like:
- Do everything you can with theme settings.
- Add additional functionality using plugins.
- Tweak a little using Custom CSS if necessary.
Ultra, unfortunately, doesn’t have any functionality to handle a splash page. Here are a few plugins you might consider for that task:
https://wordpress.org/plugins/search.php?q=splash+page
If you’re after a simple, minimalist theme you could also check out our first theme, Puro: https://purothemes.com/themes/puro/
To answer your initial question. No, it should be relatively straightforward to build your site out using Ultra or any theme of your choosing 🙂