Can Hong Kong based company file for P3 USA visa for Malaysia based speaker for a show to be hosted in the USA ?

Yes, they may be an option for you. I suggest you contact an immigration attorney through their profile on this website for a thorough discussion...

Is there any legal to ban on 5 year can I go to other countries

You may be able to qualify for a waiver. I suggest you contact an immigration attorney through their profile on this website to discuss your...

1)is there any legal to cancel the ban on 5 year 2)can I go to other countries

You may be able to qualify for a waiver. I suggest you contact an immigration attorney through their profile on this website to discuss your...

What is a better option to go for, fiancé visa or file an immigration petition after marriage??

The answer truly depends on your specific situation and goals: fiancé visa would allow him to travel to the US faster while petitioning after...

An US citizen doesnt speak english.

Your question is unclear: if the person is a US citizen, he can travel without any issues.

If I become a citizen of another country (ARG) would cause me trouble getting my green card or after years residing US citizen?

Holding dual citizenship or becoming a citizen of another country will not make you ineligible for permanent residency or citizenship.

Congratulations. You should file separate applications for each family member. I suggest you have an attorney review your applications before you...

From law profession to Green Card ?

There is no secret: they must obtain their green cards just like everyone else.

Is there is any chance for attorney to change the details in exhibit A ...it can workout or not??

It seems as if you currently have an attorney for this matter. If so, I suggest you contact your attorney to discuss this further. Good luck!

My sponsor's income is 0 & jointly filed tax return with spouse, on i864, is my sponsor still "not required for tax return"?

Since your sponsor filed a joint return, the income would be considered their income as well. While you can fill out the I-864 on your own, I...