We will have a chance in 2018 to right the wrongs of the congressional gerrymandering and win a House majority in 2020, but for now, status quo seems to be the consensus.
Even if 2018 is a Democratic gubernatorial and state legislatorial landslide, the next redistricting would be in 2021, and the first elections under new lines would be in 2022, and that Congress will be seated in 2023. (Democrats could try to make new lines earlier, like Republicans did in Texas in 2003 and Georgia in 2005, but that invites backlash, as took place in the Georgia House races in 2006, when the Democrats put in hostile Republican districts all survived).
It should also be noted that because strongly-Democratic areas are more compact and more strongly-Democratic than strongly-Republican areas, the way the House is set up by design favors Republicans, and Republicans would probably have an advantage of a few points (though not 9) with an all-neutral map; Democrats taking the House requires either Democratic gerrymandering, connecting more-populous cities with less-populous rural areas to neutralize the rural areas, or strong Democratic victories, as took place in 2006 and 2008.
I've said my view many times that 1992/1994 was a realignment away from the 1968 Nixonian consensus; and under this alignment, the Presidency is 'naturally' Democratic (Republicans have only won 1 presidential popular vote since then, 2004, which was the one time they had an incumbent running) and Congress is 'naturally' Republican (there have been four years of Democratic House control; while there've been more years of Democratic Senate control, that's because of the ability of Democratic Senate candidates to win in hostile areas, which has been ebbing away starting with 2010). Democrats might briefly control part or all of Congress, and a Republican President might briefly be elected (well, 8 years isn't that brief, but it's still a departure from the norm), but for Republicans to take the Presidency for a lengthy period, or for a Democratic Congress to hold office for a lengthy period, there would have to be another realignment.
2008 was frequently touted as a pro-Democratic realignment, but I think that's not the case; Obama's effect was to entrench the present alignment, make it harder for candidates from a party that is a local minority to win, and exacerbate the differences between presidential and midterm electorates: since Obama's election, all elections except 2012 have been a wave for the party of that electorate, and the only reason 2012 wasn't a wave was because of Republican gerrymandering in 2011 (why deny what's clearly true?) and a bad map for Democrats that opened offense to Republicans after the 2006 landslide.
