It really depends how the team takes this. I'm excited to see how they fair against an injury ridden and tired united. Quite a few of Uniteds starting 11 will have not had a break in the last week, I'm not sure how many of Evertons are, but if they are able to capitalize on the chance, they could set themselves on a good path to get back out of the relegation zone.
They could also be demoralized and crumble completely. Time will only tell.
That's a pretty good case scenario. I'm a united fan but I hope you guys show good spirits and fire tomorrow, and I hope that keeps throughout the season. Truly don't want to see you relegated like this.