Planning on doing some touring in 2011? Better do it now, because when The Arcade Fire and Portishead come through on their co-headlining tour, they’re pretty much going to crush all other tours. And I don’t even mean that they’re just going to overshadow other tours — I mean that they’re literally going to kill other touring acts. “I will feast on your blood,” said Arcade Fire frontman Win Butler. Portishead member Geoff Barrow was only slightly less threatening, mentioning the proposed tour on his Twitter in a gruff tone. No word yet on the whole tour itinerary, but the two bands are sharing some European festival dates in the summer. So… Europe? In the summer? That’s my guess.