From atU2.com, March 17, 2013
"Twitter was all a-flitter earlier this week when a fan attending a Killers concert bumped into Stuart Morgan, Adam’s guitar tech, and asked him when the next U2 tour was slated. The tweet stated plans were for spring 2014 starting with arenas in the U.S. The timing seems right, and the venue selection seems to match the sentiment Bono shared about wanting to go smaller."
This news confirms what was posted earlier here: http://zootopia.u2.c...s-tech-tonight/