It's true. Mats Sundin is Isildur1 and we've got the video evidence to prove it.
Another blog somehow scooped us on this completely made-up absolutely true story and in the world of internet reporting two sources reporting the same thing is about as close to corroboration as you're going to get.
But the good news is we can finally put this whole Isildur1 thing to rest. It's Mats Sundin, get over it.