It may actually be a genuine design, but from much earlier in the war (late 1940/early 1941). There is circumstantial evidence that it was intended as a stopgap replacement for dedicated Luftwaffe anti-shipping aircraft that were being diverted eastwards from western theatres (in particular Norway) as part of preparations for Operation Barbarossa. From what I've been able to piece together it seems to have been a pretty short lived project, primarily due to it not originating from within or otherwise authorised by the RLM (which was notoriously protective of its turf). Of course, that doesn't mean that necessarily mean that it was actually a Lippisch project though.