Remember, OCS is a productions source that is meant to fill quota needs otherwise not satisfied by the Navy's main production source (ROTC and the Naval academy). So I believe that the summer classes are pretty much already spoken for since that is when these students are expected to ship out. They will likely try and ship all the pending OCS pipeline folks by April at the latest, usually based on a factors such as; when you were pro recd, whether you wear boxers or briefs (yes I am trying to be cute here). The entire process is very piecemeal and opaque. Therefore, any attempt at speculation is utterly useless.