After filing for change of status, will my wife and her son be able to travel internationally?

Make sure to file for advance parole for travel as soon as status changes. As may take some time to process.

Yes, Do not withhold information, as can have negative consequences later.

There is not set time or statute of limitations on investigations.

Please be advised of answers to the questions mentioned under the 'Explain Your situation' section above.

You should consult directly with an immigration attorney to see which option is best for you. Generally speaking, sibling sponsorship (uncle - dad...

Can I apply for the K1 visa before I fulfill the 2y rule? Due the fact it takes a while for them to approve it.

You cannot apply for K1visa before fulfilling 2 year requirement. You actually should not have been allowed to enter under B2 visa until 2 year...

Will my travels & stays abroad, albeit for valid reasons, break my continuous residence? Should I apply for N400 now or wait?

You need 30 months (2.5 years) of physical presence, and 5 years of continuous residence with no more than 6 months outside the U.S. Without...

Renewal of passport and visa?

You can have the visa transferred for convenience. But you should be fine if you just Keep both passports.

What is the H1B process to get back to US? What kind of GC category would I be eligible, after coming back to US?

You need to discuss this out with an attorney, as the EB1 process is complicated and things apply to different cases and depending on...

Worker's comp state minimum increase

Workers compensation is determined based on wage you earned at the time of the accident.

Can I sue my co worker under criminal charges including assault/battery?

Pursuing criminal charges is up to the prosecutors discretion. You can always request a restraining order.