It / this will be the first time

Hello, can you help me please. I can't explain why this is wrong/right

1. This is the first  time he has visited his aunt.

2. This was the firs time he had visited her aunt

3. It / this will be the first time he is visiting / will visit his aunt

In none of the grammar books I have thumbed through so far is the last option (no:3)  discussed. How can we speak of the future plans or intentions in a sentence beginning with "This will be the first time.........."

Your help is much appreciated. Thank you

This is the first time he has visited his aunt.

Can be said before he visits or when he is there.

This was the first time he had visited her aunt.

<This time I'm telling you about> was the first time he had viisted his aunt.

Used by a writer narrator to bring the reader into the present of the story. A little like "Now was the time he knew he had to visit his aunt". Tense shifting for effect.

 It / this will be the first time he is visiting / will visit his aunt.

Said before he goes (or when on his way).

I am a little confused. Anonymouses, are you all  the same person?

So you say  ;

This will be the first time he is visiting his aunt.

This will be the first time he will visit his aunt.

This will be the first time he visits his aunt.

all of these are true and mean the same thing? Please someone make it clear.