Maybe they net 12-15. Tops.
This is my prediction.
6 months ago, I honestly thought along these lines. Now, I am backing it off to 8 to 10, at most and it could be a little less. The new maps pretty much resulted in a wash. Cook has an excellent tally on that. TX and FL were 2 states the GOP thought they would make huge gains with new maps but due to some issues around mandatory minority created districts, that didn't happen. IL and NC pretty much cancel each other out. The R's gain because of less seats in some places (MA, PA) but the new maps themselves don't make much of a difference. In the past few months the R's have caught some breaks. CA 31 wasw gift wrapped. Boren retired. The seats in PA look safe fror them.