Adding Brother to Already-Approved Petition For Parents

[asking4answer 0]

I am a US Citizen. I originally applied for separate petitions (I-130) for both of my parents. Both of the I-130 were approved. I "canceled" my mother's petition upon her death. Now, my father's petition is already on Visa processing (I am yet to send payment for the Visa as of this writing). I have already filed my Affidavit of Support for my father (I am waiting for further instruction from Visa center).

Question is:

I have a brother who is living with my father in the Philippines. My brother is turning 21 years old in 2 years time.

What are the process I need to file for my brother's petition?

If I need to file a new petition for my brother, how will that affect my father's current petition (since I already sent the Affidavit of Support for my father only)?

Is there any way I can modify the current petition for my father to include my brother? How? How long it will take?

Or, I just wait for my father here in the US and file for another petition for my brother? Another option will be for my father to petition my brother (father petitioning for a son)?

What is my best options from the above (or you can suggest a better one)?

Thank you in advance!

[payxibka 10,047]

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