I'm not sure. It depends on the specific context and source of 'New Look'. Sometimes things presented as stories might have elements of truth mixed with fiction.
One of the best elements could be the exploration of their complex relationship. Since Byakuya has a somewhat reserved and strict nature and Rukia is more free - spirited, seeing how their love develops in fanfiction can be really interesting.
A plotline could involve Byakuya's new wife being from a different clan or group. She might see Ichigo's power and Rukia's connection to him as a threat to Byakuya or their family. So she starts plotting against them. Meanwhile, Ichigo and Rukia are trying to figure out what's going on and how to protect their relationship, whether it's a platonic or romantic one. This could lead to battles, both physical and emotional, and a lot of character development for all involved.
I'm not sure of specific new 'byakuya loves rukia' fanfiction stories off - hand. But you can try searching on fanfiction platforms like Archive of Our Own or FanFiction.net. There are likely to be many stories with this theme there.
In the context of a new look in technology, say a new smartphone design. The fact is the actual design elements like a new screen shape or a different placement of buttons. The fiction could be the hype around it. Just because it looks different doesn't mean it's a revolutionary change in functionality. Sometimes companies create a big fuss about a new look to attract consumers without significant underlying improvements.
Most probably not. Usually, such titles are made up for entertainment purposes rather than being based on real events. There might be elements inspired by real life, but it's not a direct account of a true story.