Working in the radio industry in Toronto, came across this magazine today. It features a 4 page article about Muse's live stage setup, and mixing. Nice and detailed too with interviews from engineers Mark Carolan and Adam Taylor.
Scans are below....
or you can go here and flip to page 38.
http://www.professional-sound.com/online/
If Muse can do 2 shows in Toronto, then surely they can fill out BMO field here. It's a smaller football stadium that the MLS team plays in. Seats about 22k, wikipedia says it can fit 28k for concerts, and would be perfect.
Matt mentioned on twitter there would be 3 shows in the state of Florida in February.
He also told me in person that they would be in Toronto on April 9th.
That's all we know so far.