Naruto could also be confused. He might not understand why Sakura did what she did in the first place. So, when she shows regret, he would ask her a lot of questions. He wants to make sure that she won't betray him again. And if he gets satisfactory answers, he would be more than happy to have her back as a friend and teammate.
At first, Naruto could be hesitant. He would remember the pain of the betrayal. However, as Sakura tries to make up for it, Naruto would start to warm up to her again. He might test her loyalty in small ways, like asking her to help with a difficult task. If she succeeds, he would fully accept her back into his circle of trust.
Naruto himself would be deeply hurt. He is a character who values friendship and loyalty highly. He would probably try to talk to Wonder Woman first, to understand why she did it. If she doesn't give a satisfactory answer, he would be forced to defend himself and his world. His other comrades like Sakura would be ready to back him up, and they would be angry at Wonder Woman for breaking the trust. As for the other side, Wonder Woman's friends like Steve Trevor might be confused and try to mediate at first, but if the situation gets worse, they might also side with her.
Naruto might also try to remember Sakura in a positive way. He would cherish the memories they had together. He could start initiatives in the village in her name, like promoting medical ninja training more, since Sakura was a great medical ninja. He would slowly turn his grief into a force for good in the village.
At first, Naruto would likely be extremely shocked. He has always considered Sakura a friend and teammate, so this would be a huge blow. He might question his own judgment in trusting her.
Sakura might react by being more assertive around Naruto. Instead of being shy or holding back, she could be more forward in showing her friendship or even her deeper feelings. She may also try to intimidate the fangirls in a way, like using her strength as a ninja to show that she is not one to be trifled with.
Sakura would likely be devastated. Naruto has been her friend and teammate for a long time. His death would leave a huge void in her life, and she'd probably go through a long period of mourning.
Sakura might initially be confused. She would probably wonder why Naruto is acting this way all of a sudden. For example, she might try to get his attention by calling his name a few times, but when he doesn't respond, she could be left feeling a bit bewildered.
The village would probably be in shock at first. Naruto is a very important figure in the village, and his marriage is a big deal. Some might be happy that he has two strong women by his side, thinking it would strengthen the village even more. But others, especially the more traditional ones, might be against it as polygamy is not a common practice in the Naruto world. They would likely gossip and there could be a lot of hushed conversations in the streets and in the tea houses.
Kakashi would be more of a supportive figure. He has seen Naruto and Sakura grow up, and he would likely be happy for them. He might offer some advice to Naruto on how to handle this new relationship, especially considering the challenges they might face as ninjas. For Sakura, he could give her words of encouragement to be true to her feelings.
Sasuke might initially be a bit aloof but secretly be happy for them. He's always had a complex relationship with Naruto and Sakura, and deep down, he would see that they are good for each other.
Sakura might be completely shocked at first. She might freeze for a moment, not believing what's happening. Then she could start crying tears of joy and say yes immediately.