A "new" 55-200 IS STM was posted for pre-order on Adorama last night? Is that the same one mentioned in the inital post? If so, at least half of the rumor is true.
I checked out Adorama's site and didn't see it. Do you have a screen shot or a link?
Gear: 5D Mark IV, 135L, 85LII, 35LII, 100L, 70-200/2.8L IS II, 16-35/4L IS, Sigma 50mm Art, 600 EX II-RT (x2), 24-105 IS STM