Apologies, I was not clear.
the statement, "I have completed my I-130 and have started on the IR-1 Immigration green card process. I am entering the country to change the process I receive my greencard through and Adjust Status within the US"
Documents that could support such a statement as above. My wife recently came on an ESTA, and, although we brought documents to support our claim that she would return to Japan, they didn't ask her for any evidence.