Boruto has the ability to use the Rasengan, which is a very powerful jutsu. He also has the Jougan, an eye power that gives him unique abilities like seeing chakra and some kind of predictive vision.
Their powers could actually be beneficial in some ways. Boruto's ability to think on his feet and use his various skills could help in solving some past problems. Himawari's Byakugan could be used for reconnaissance in dangerous situations in the past. But they must always remember that any use of their powers could have a butterfly effect. So they would need to be cautious and consult with each other before taking any major actions with their powers.
Rimuru Tempest has a wide range of powers. One of his main abilities is the power of Gluttony. This allows him to devour almost anything and gain knowledge or abilities from it. For example, he can devour monsters and acquire their skills, which makes him extremely versatile in combat.
Boruto's ninjutsu like the shadow clones could be used in creative ways in combination with Goku's attacks. For example, the shadow clones could distract an enemy while Goku charges up a Kamehameha. Goku's ki - based attacks could also enhance Boruto's Rasengan, perhaps by adding a ki - infused shell around it. Boruto's ability to sense chakra might be affected by Goku's intense ki, and he could learn to use it to his advantage, like sensing enemies from a greater distance.
If Boruto uses his rasengan in the past or future, it could have unforeseen consequences. It might be a new jutsu in that time period and could cause shockwaves through the ninja world. Sarada's chakra control, which is enhanced by her sharingan, could help her adapt more quickly to the different chakra levels in the time - travel destination. For example, if they go to a time with weaker chakra, she could still perform her jutsus effectively while Boruto might have to adjust his power output more.
A common power in fanfiction is enhanced magical senses. Characters can sense magic from far away, like being able to detect a hidden magical artifact from miles away just by the faint magical aura it emits. This helps in treasure - hunting type of storylines.
Loki, the God of Stories, has the power of shape-shifting and can assume various forms. He's also highly intelligent and skilled at deception and manipulation.
No, Boruto is alive in the manga. The plot hasn't led to his death. However, the manga is ongoing, and anything could happen in the later developments.
Well, their child might inherit Naruto's chakra control and Shion's unique spiritual powers. Maybe the child could have an enhanced form of the Rasengan, combined with Shion's ability to predict the future in a battle sense. For example, being able to foresee an opponent's moves just a split second before they make them and using that knowledge to adjust the Rasengan's trajectory for a more powerful and accurate attack.