I think you guys are kidding yourselves if you think the Roses are that big here. Those 225,000 tickets were in their home territory that knows them like the back of their hand. Now fly across the pond to the states, sure they have their following here, but drop their name here infront of your indie hipsters here and I'll bet the number of blank stares will greatly outnumber the excited responses.
The britpop scene here is too small for an MSG gig. I mean, at Coachella, Suede played to a barely half empty tent. I know the Roses are a bigger name than them, but not by THAT much.
in NYC, they'd play Roseland or Beacon. That's my guess.