1. I really want to see the sunrise. I think it will be amazing. 2. I really want to see the sunrise. I think it would be amazing. Both are correct, but with different meanings. #1 "... it will be amazing" is a form of a type 1 conditional for a real present/future situation. The meaning is "... it will be amazing if I see it." #2 "... it would be amazing" is a from of a type 2 conditional for an unreal present/future situation. The meaning is "... it would be amazing if I saw it." Here, the past tense (I saw) is used for an unreal present or future. For more information, google type 1 and type 2 conditionals. If you have the famous book English Grammar in Use by Murphy, consult unit 38 (If I do ... If I did).

“Will be amazing” has the implication that you have definite plans on going to see the sunset later and you’re just waiting for the event to happen. “The movie WILL be amazing” implies you already have plans to go and you’re just waiting to see it. “would be amazing” implies that that you do not have definite plans yet to see the sunset so the conditional tense is used. “The movie would be amazing” implies you don’t have definite plans yet to see it.

Number 2 is most likely what you mean to say, although both sentences could be correct depending on what you mean. 1. Meaning: The sunrise WILL happen, and I want to see it. I'm saying that I want to see the sunrise and that THE SUNRISE will be amazing. (It=the sunrise, which WILL definitely occur.) You can also say, "I'm looking forward to seeing the sunrise tomorrow. I think it (the sunrise) will be amazing." 2. Meaning: Seeing the sunrise would be amazing, and I really want to have that experience. I'm saying that I want to see the sunrise and that THE EXPERIENCE (of seeing it) WOULD be amazing. Going to see it is a hypothetical situation, so I cannot say WILL. I don't know if I will see it, but in the event that I did get to see it, my seeing of it WOULD be amazing. Make sense? This is tricky for non-native speakers, I've found.

I never know why everyone wants to make this so difficult. If it is probable - will If it is unlikely/impossible - would