Based on history (and some personal experience in the contest) here are some predictions to be taken with a grain of salt.
I'd expect these bands to be in the top five in no particular order:
Richland, Summit, Lake Ridge, Burleson Centennial, and Highland Park
Richland - will have good design and interesting music. They'll have some cool visuals to go along.
Summit - might be the loudest hornline you hear Saturday. They've improved their design and arrangement over the past few years, and had a successful season last year.
Lake Ridge - their area is growing and the band will show it. They'll be clean in the feet and have a buttoned up and round sound.
Burleson Centennial - will awesome show design, probably giving a few features to their percussion. Really, the way their show was produced last year was solid musicaaly and visually.
Highland Park - will be CLEAN. They were neck and neck with Waxahachie in the beginning of last year and can't see them not holding up that standard. They'll have a good concert sound on the field, and are looking to return to State Finals this year.
Also to be considered for those spots:
V.R. Eaton, James Martin, and Granbury