Unlikely. Any new bi-level would have the same height restrictions as the SuperLiners. (Using more modern design, they might be able to get an inch or two of additional height by making the roof and 2nd floor structure a little thinner, but they would still have to pass crash test strength standards, so it would be an enormous amount of money for very little gain.)
There is no reason why a new single-level sleeper should have less height than a ViewLiner and Amtrak should demand any proposals be at least as tall inside and have at least the same window area as the VL1 and VL2s. They might not be identical, but the ceiling height, bed length, width and accessibility (the ease of climbing into the upper bunk) would have to match or exceed the ViewLiners, if Amtrak is remotely competent.