After Final Round, Champ's world was falling apart around him. That loss really did something to him because it was not close. Even Shady or whoever was streaming at the time said it completely shattered him. Imagine putting all your time and resources into someone or something just to let the final result slip away from you. He streamed his training sessions, he talked about various matchups, he read up and watched videos, and he played hundreds of matches a week.
As people say, Champ always arrives early to a venue. He is very dedicated. But all of that is for naught as you lose to someone who plays a dozen other games and from a public standpoint doesn't really have as much as knowledge as you do about the game.
Now after a month or so later, Champ had the time to use Morrigan himself on a more serious level to see how she works and has started a campaign to get other people to use her so everybody can get an idea of how to fight her. They have done their homework and game time is soon. This is more important than EVO. EVO is neutral grounds and has a party atmosphere. NCR is your home turf, you are the king of your domain. You cannot let someone else come in and take what is yours. Your people will root for you. Everything is to go your way. Losing is not an option.