IRS can do some dumb things, but I won't go so far as to predict they will take 1099-G reports of unemployment compensation seriously when they run them through the Automated Underreporter program. There are going to be so many fraudulent ones that it will bog down everything else.
They can't do many smart things, though, so I don't expect them to send a preliminary notice to possible CP-2000 matches, asking if they really did collect unemployment last year. Even that would jam the phone lines, not just at IRS but at state unemployment offices.
Even though these are submitted electronically by the states, IRS does not have the capacity even to process them into the system, much less match them to returns, until late May. See chart on Page 24: