Seagull and his team (Luminosity) playing a tournament right now against Cloud9, very high level play from everybody, in fact Seagull has been kept at bay and dominated several times.
https://gaming.youtube.com/watch?v=gT1FP0MoiAo&feature=live-chat-promo
God's McCree is constantly dominating Seagull's Genji.
Watching from the beginning (nice feature) and seeing all these double lucio, winston, mcree and tracer teams on KOTH makes me think Blizzard are going to limit heroes to one in competitive mode because there's no way they like only 8 heroes being viable for tournament play. Atleast with a 1 hero limit you'll be forced to use others.