Given how overstuffed the European market is with brands and knowing that Chinese investors seem to really dislike putting money into any form of marketing, can't say this is very shocking. If you revive a long-dead marque you need to be shouting its heritage from the rooftops for quite a while to make people know what it was, is and will be all about, especially if you're intending to sell to the mass market.
Was there ever any kind of extended media campaign for Borgward's revival, or did they just presume the name would sell itself?