wanna add something, i had a similar situation, i applied for a divorce before the 498a was filed,she left to india once she saw the summons and filed a 498a after 2 months and she contested the case partially argueing that she was not summoned according to law, i was grated divorce by the magistrate, she appealed to the judge providing all the details of the 498a such as the FIR, Charge sheet, arrest warrants, DV case what not everying , but the judge supported the magistrate's judgement, she went to the court of appeal but eventually all three judges in the court of appeal did not consider the evidence she provided, recently they also supported the judgement that was passed by magistrate, and eventually she has nothing now, case in India will go on, but who cares as i am in US and legally divorced.
After my wife side bribing the cops and others involved my passport Impound order was passed but i got stay from High Court and submitted to the passport officer. no one can now touch my passport.
i checked for Extradition but came to know that its not that easy to give an Extradition order even after bribing everyone.
i even got my H1B extended within 4 days after applying, without any issue after the 498a case was filed, im pretty sure my wife would have sent the case details to USCIS and all the US Embassies in India. but that did not affect the US processing.
so dont worry even if your wife will send all the case details to anyone, no one will really consider unless you are proven guilty by the court in India or you have any issue with law in US.
Indian government doesnot have enough money to send a CBI team to US and coordinate with FBI to get you back to India, dont think even CBI or FBI have enough time to look at these cases at all.