It's very early but I don't think that the Democrats will "wave" to majorities in the House or Senate.
I have two reasons for feeling this way:
1) The Democrats can not pick up 25 seats unless they win in rural or suburban districts. I don't see that; and,
2) The Democrats have a bad Senate map in 2018. They will be defending seats in West Virginia, Missouri, Indiana, North Dakota and Montana.
Can they do it? Everything is possible but my money is not on a "blue wave" at this moment.