While the show matches are fun, I feel like recently they've all been people I've never heard of. Here are some ideas for new types of showmatches that I think would be fun.
IGL Battle - The premise of this would be to pull 8 members of the audience and have a pro player IGL for each team. I feel like this would be really fun and show the real gap between pros and the regular pros.
1 v 1 - A small bracket that would let pros have a 1v1 tournament. The matches would be short to fit everything, first to 5 kills and 7 for the finals.
Unlimited Abilities - Have 2 teams of random pros/celebs play with unlimited abilities.
Handicap Match - 2-3 pros vs 5 regular players from the crowd.
These are just a few examples but I feel like the showmatches would be more fun if they got the community involved.