That wouldn't make sense. Why would the shadow broker suddenly be not working, and why would Shepard suddenly not be in jail, it doesn't make sense. The end of 2 dictated that Shepard was going to turn themselves in to the alliance for the death of all the Bartarians, regardless of whether they wanted them dead or not. Shadow Broker barely had time for Shepard before she was the broker even, all the new information would only make her job 10X bigger or more. She wouldn't suddenly have time for Shepard.
ME4 won't have Liara, they stated that ME3 was the end of shepards time line, Liara is part of that timeline so that beautiful beautiful wet dream is gone. There's a lot of speculation it's going to be about the human turian war.