DDOT has been planning to convert the highway stub from 11th Street SE to Barney Circle with a "boulevard" that would include a bike path since before the 11th Street Bridge project began. And despite the reopening of an interim road in its place, they still are.
From a biking perspective, the changing designs have largely been a non-issue. In early 2013, they held a scoping meeting and the rough vision included sidepaths along the boulevard and new possible connections between Hill East and the Anacosita. The concepts presented 6 months later, placed a sidepath along the boulevard, a bike path in the center of Barney Circle and sidepaths around the ouside of it, and provided new bike crossings at 13th, 14th and 15th Street SE; but that design was unpopular because of the road design. In July of this year, the office of planning came out with its own concepts that kept all of these features, though one concept had none of the connects and some had connections at 16th as well. In addition the new designs looked greener with more park-like space.
Fast forward to this fall and the office of planning has released progress designs (a better presentation is here). These designs show three concepts. All include a bike path along the entire boulevard, sometimes in the middle and sometimes on the river side; a Barney Circle with a bike path in the middle and sidepaths on the outside; connections between Hill East and the river at 13th, 14th and 15th; and (now) green-painted bike lanes as visible in the illustrative rendering above. In two concepts, 16th connects to Southeast Boulevard, but not to the Anacostia.
For cyclists, Concept C might be the most different, but the center path and its frequent road crossings will be less appealing than L Street or the path along the river side for through-cyclists.
Concept A places buildings between L Street and SE Blvd.
Concept B consolidates the lanes of SE Blvd and L Street into a new L Street, with the buildings in what would be the median. It also keeps a new connection at 16th Street.
Concept C replaces the buildings in the median with a park, has a SE Blvd separate from L Street like in Concept A, and keeps the 16th Street connection from B. It also has differently styled connections down to M Street.
All the concepts would connect at 13th and M to a new bike/ped only Virginia Ave SE from M Street to the waterfront. It also appears that there is another connection through the to-be-built 1333 M Street SE development.
In the meantime, DDOT is planning to reopen the "interim" Southeast Blvd, which doesn't appear to have any bike lanes, sidewalks or paths.