They obviously tried to hide traces of the atrocities commited but was there an actual plan when they decided on the Final Solution as to what they would present to the world? There would have been questions like "where are all those Jews?". They phisically removed even their remains, so how would they have explained that?
See u/commiespaceinvader's (per usual) excellent comment here about ways that the German government tried to hide what was going on from the outside world, German citizens and its victims, both while the Germans were still doing well and once they were already losing.