The more I think about the Incredible, the more I wonder about this possibility. I don't think it's likely if, indeed the Supersonic does in fact have the 4.3" screen, considering that the video and photos appear to show that the Incredible has a 3.7" screen (Thanks to Nash for the photoshop estimating btw). What I have noticed about the two leaks is that they both have very similar designs: rounded-edges, touch-sensitive buttons, iphone-similar styling. This really shouldn't be that big of a supprise though, VZW and Sprint like nudging manufacturers into modifying their designs to their liking. At least they did with the Hero. So, I think that it's plausible (maybe likely...maybe) that the Incredible and Supersonic could be relatives in design. Not necessary brothers, but maybe cousins, or first cousins once-removed from their ex-mother-in-law's step-sister.
The bigger question, at least for myself, is what about the Supersonic? ATT looks like it will probably get the Desire. I refuse to go to 'Ma Bell (long story, don't ask). I don't really consider the Legend, although very good looking for what it is, on par with what the Incredible should be. And I, like some out there, am a little skeptical about support for the N1.
So that leaves the Supersonic. Rumored to be coming out by summer.
Sprint Says First 4G Handset Will Launch By Summer Velocity - Forbes.com
Or not
Sprint promises 4G phones in 2010, but not by summer | Dialed In - CNET Blogs
Whatever may or may not be, we have seen some leaked pictures and it
appears as though this phone will be on shelves sometime this year. What I'm long-windily (sorry) trying to say is: would the Supersonic change anyone's mind should it come out before the Incredible? Either way, I really, really hope that Verizon will have some good news for us by CTIA.