He’s just sold out 5 shows in Dublin Ireland at a venue called Croke Park which holds 80,000 fans (400,000 total tickets sold) and also just performed on the Tonight Show with Jay Leno for Leno’s last song. Garth Brooks was sporting a Garth Brooks World Tour hat which pretty much was an obvious-subtle hint.
There is lots of talk about Garth Brooks announcing a full, 3 year world tour which would include Europe, North America, Australia, Asia and South America. Fans have patiently waited over 10 years for a tour from Garth. The best they’ve got were a few public appearances and a few live shows at the Wynn in Las Vegas in 2013.
In a video interview before a CBS broadcast of the love concert in Vegas, Brooks tip-toed around the question of a tour but confirmed that he is working on a tour. It’s expected that Garth Brooks will hit major markets and hot spots like Dallas, Nashville, Boston, Houston, Chicago and others as part of his North American Leg of his comeback tour.
Regardless of the venue, city and date, each show will sell out within minutes! (Source)