Blitz teams are hard to counter because it is basically a Battle Power stand off. If you have more power than a blitz team and your ninjas survive the first turn then there you go, but if you have less and you lose one or 2 ninjas then its over.
I see people saying a sage, gaara, jin team. But even with that a high bp blitz will rip right through it probably killing the sage clone, sage, and pressing quite a bit of damage on the WM.
The only big counter to a blitz team is a Hinata. She will soak all the damage turn 1, and block the whole blitz.