HTC hosting media event September 15th in London

HTC is circulating the above invite to members of the press taunting them to visit London on September 15th to see exactly what they’ve “dreamt up.” We’re secretly hoping that this will be the unveiling of the company’s first Windows Phone 7 handheld, but we have a feeling that it may be a little early for WP7 just yet; in that case this probably is a new Android device (hopefully not just for those folks who live across the pond). Rumored HTC devices on the table thus far are the Vanguard/Vision, Desire HD, Glacier, Schubert, and Mozart. Any guesses and/or preferences as to what HTC might have in store for us?