Will Grey's End Season with Some "I Do"?

Spin-off shmin-off: let's talk Grey's Anatomy proper. The popular rom-dram may — just may — wash away its Season 3 backstage troubles and on-screen waterski-flirtations with a May wedding for Cristina and Burke. Judging by pics and sightings shared at JustJared, Katherine Heigl's Izzie is suited up as a bridesmaid, while Ellen Pompeo appears to be the Mer of honor. The spied scenes, though, are merely from a bridal-shop try-on session for Yang & Co., so will the vow-swap actually go off without a hitch? Or will a presumed-dead Tina Lord crash the ceremony toting Burke's long-lost son, Milagro? Actually, that I'd rather see.