Hello All
I'm fairly new here but just wanted to add some suggestions to the beautiful dresses proposed.
Dress 1 (bateau neckline & A-Line skirt) -
https://www.magbridal.com/p-marvelous-satin-bateau-neckline-ball-gown-wedding-dress-69126.html
I think this is simple but would look amazing with a dramatic veil and the right tiara.
Dress 2 (bateau neck & ballgown skirt) - My personal favorite
https://www.instagram.com/p/BdAzUPbnJ0H/
This gown is so perfect and I see it has been mentioned previously. Just wanted to put in another vote for this design with maybe a bejewelled veil.
Dress 3 (Krikor Jabotian - This is what I think of when I think of a royal princess's wedding gown)
https://i.pinimg.com/564x/e7/14/8e/e7148e051c3727019b4a600c0cdfcd2f.jpg
https://i.pinimg.com/564x/5f/dc/48/5fdc48b033f441f07dffa00e21935de7.jpg
https://i.pinimg.com/564x/e9/bd/5d/e9bd5dc99a82c037658a66977470a033.jpg
Dress 4 (Elie Saab - this type of dress is a wildcard based on the minimalism that MM prefers but she has stated her love for the designer and did say she liked whimsical wedding dresses, so who knows)
https://www.instagram.com/p/BTHeyiIljpf/
http://e.glbimg.com/og/ed/f/original/2017/10/09/elie-saab-bridal-inverno-2018_5.jpg
Some other beautiful dresses:
https://i.pinimg.com/564x/c2/4c/1a/c24c1ac95ba4a3802411dae27402dacd.jpg
https://i.pinimg.com/564x/1c/ba/1d/1cba1d455e50e622b9b4a660f23d08b4.jpg
https://i.pinimg.com/564x/b0/b3/c7/b0b3c7132fd31bdb52b1ac08b67419fd.jpg
https://n.nordstrommedia.com/ImageG..._color=FFF&format=jpeg&w=391&h=600&quality=70
https://cdn.shopify.com/s/files/1/1182/9792/products/SWD0058b_400x.jpg?v=1514877358
https://i.pinimg.com/564x/b1/47/84/b14784393c71cc07c1cbec48783784a0.jpg
https://i.pinimg.com/564x/07/8f/aa/078faa8a3de65943642e11e4f9d72d57.jpg
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Elements that I think would work perfectly -
Bold embellishments strategically used like this -
https://i.pinimg.com/originals/cf/2b/bc/cf2bbcb602e7bd29a82c255566cf567c.jpg
https://i.pinimg.com/564x/25/6f/13/256f135bb01035f4eff9ccc9b1609385.jpg
A structured neckline, skirt and train:
https://i.pinimg.com/564x/17/23/b3/1723b3365d8cfc6ea91d2ebc784d5e84.jpg
Nothing as elaborate as this but the effect is beautiful and can be scaled down for a train -
https://i.pinimg.com/originals/11/5a/99/115a999c7e5c1a61b77a871f59e2628b.jpg
Contrasting embellishment/ unusual colour - These two go hand in hand and it would be so great to see a different colour in a Royal wedding dress for once. A pale blush or the slightest, iciest blue with metallic beading for instance. If done tastefully and in a light-handed way, this could be so stunning. Think Stephanie of Lannoy and her silver dress.
Examples:
https://i.pinimg.com/564x/26/16/10/2616108d528dfdb57ae2706090aa4bc1.jpg
https://i.pinimg.com/564x/0b/a6/17/0ba6178cab7ba22b25ebd84b25c2797e.jpg
And finally, a dramatic veil if the dress is on the simpler side -
https://www.blossomveils.com/wp-content/uploads/2017/12/BV_Fall201714159-2.jpg